Algebra 1 : How to solve one-step equations

Study concepts, example questions & explanations for Algebra 1

varsity tutors app store varsity tutors android store

Example Questions

Example Question #151 : How To Solve One Step Equations

Solve for \(\displaystyle w\):

\(\displaystyle w-12=124\)

Possible Answers:

\(\displaystyle w=126\)

\(\displaystyle w=\frac{31}{3}\)

\(\displaystyle w=112\)

\(\displaystyle w=136\)

Correct answer:

\(\displaystyle w=136\)

Explanation:

\(\displaystyle w-12=124\) 

Add \(\displaystyle 12\) to both sides.

\(\displaystyle w=136\)

Example Question #152 : How To Solve One Step Equations

Solve for \(\displaystyle x\):

\(\displaystyle 12x=-264\)

Possible Answers:

\(\displaystyle x=-1200\)

\(\displaystyle x=-22\)

\(\displaystyle x=-3168\)

\(\displaystyle x=-32\)

Correct answer:

\(\displaystyle x=-22\)

Explanation:

\(\displaystyle 12x=-264\)

Divide both sides by \(\displaystyle 12\).

\(\displaystyle x=-22\)

Example Question #153 : How To Solve One Step Equations

Solve for \(\displaystyle x\):

\(\displaystyle -\frac{x}{5}=12\)

Possible Answers:

\(\displaystyle x=-17\)

\(\displaystyle x=-\frac{12}{5}\)

\(\displaystyle x=-40\)

\(\displaystyle x=-60\)

Correct answer:

\(\displaystyle x=-60\)

Explanation:

\(\displaystyle -\frac{x}{5}=12\)

Multiply both sides by \(\displaystyle -5\).

\(\displaystyle x=-60\)

Example Question #154 : How To Solve One Step Equations

Solve for \(\displaystyle k\):

\(\displaystyle k+9=-88\)

Possible Answers:

\(\displaystyle k=-97\)

\(\displaystyle k=-108\)

\(\displaystyle k=-81\)

\(\displaystyle k=-91\)

Correct answer:

\(\displaystyle k=-97\)

Explanation:

\(\displaystyle k+9=-88\)

Subtract \(\displaystyle 9\) from both sides.

\(\displaystyle k=-97\)

Example Question #155 : How To Solve One Step Equations

Solve for \(\displaystyle h\):

\(\displaystyle -\frac{h}{6}=-42\)

Possible Answers:

\(\displaystyle h=128\)

\(\displaystyle h=252\)

\(\displaystyle h=-252\)

\(\displaystyle h=7\)

Correct answer:

\(\displaystyle h=252\)

Explanation:

\(\displaystyle -\frac{h}{6}=-42\)

Multiply both sides by \(\displaystyle -6\).

\(\displaystyle h=252\)

Example Question #156 : How To Solve One Step Equations

Solve for \(\displaystyle x\):

\(\displaystyle -\frac{x}{10}=-0.1\)

Possible Answers:

\(\displaystyle x=10.1\)

\(\displaystyle x=-0.9\)

\(\displaystyle x=1\)

\(\displaystyle x=-1\)

Correct answer:

\(\displaystyle x=1\)

Explanation:

\(\displaystyle -\frac{x}{10}=-0.1\)

Multiply both sides by \(\displaystyle 10\).

\(\displaystyle x=1\)

Example Question #157 : How To Solve One Step Equations

Solve for \(\displaystyle x\):

\(\displaystyle 10x=29\)

Possible Answers:

\(\displaystyle x=\frac{29}{10}\)

\(\displaystyle x=290\)

\(\displaystyle x=19\)

\(\displaystyle x=\frac{10}{29}\)

Correct answer:

\(\displaystyle x=\frac{29}{10}\)

Explanation:

\(\displaystyle 10x=29\)

Divide both sides of the equation by \(\displaystyle 10\).

\(\displaystyle \frac{10x}{10}=\frac{29}{10}\)

\(\displaystyle x=\frac{29}{10}\)

Example Question #158 : How To Solve One Step Equations

Solve for \(\displaystyle x\):

\(\displaystyle \frac{x}{12}=24\)

Possible Answers:

\(\displaystyle x=2\)

\(\displaystyle x=36\)

\(\displaystyle x=\frac{1}{2}\)

\(\displaystyle x=288\)

Correct answer:

\(\displaystyle x=288\)

Explanation:

\(\displaystyle \frac{x}{12}=24\)

Multiply both sides of the equation by \(\displaystyle 12\).

\(\displaystyle (12)\frac{x}{12}=24(12)\)

\(\displaystyle x=288\)

Example Question #159 : How To Solve One Step Equations

Solve for \(\displaystyle x\):

\(\displaystyle \frac{x}{14}=-21\)

Possible Answers:

\(\displaystyle x=-38\)

\(\displaystyle x=-7\)

\(\displaystyle x=-\frac{3}{2}\)

\(\displaystyle x=-294\)

Correct answer:

\(\displaystyle x=-294\)

Explanation:

\(\displaystyle \frac{x}{14}=-21\)

Multiply both sides of the equation by \(\displaystyle 14\).

\(\displaystyle (14)\frac{x}{14}=-21(14)\)

Remember that when a negative number is multiplied by a positive number, the answer is always negative. 

\(\displaystyle x=-294\)

Example Question #160 : How To Solve One Step Equations

Solve for \(\displaystyle x\):

\(\displaystyle \frac{x}{4}=-21\)

Possible Answers:

\(\displaystyle x=-84\)

\(\displaystyle x=-25\)

\(\displaystyle x=16\)

\(\displaystyle x=-\frac{21}{4}\)

Correct answer:

\(\displaystyle x=-84\)

Explanation:

\(\displaystyle \frac{x}{4}=-21\)

Multiply both sides by of the equation by \(\displaystyle 4\).

\(\displaystyle (4)\frac{x}{4}=-21(4)\)

Remember that when a negative number is multiplied by a positive number, the answer is always negative. 

\(\displaystyle x=-84\)

Learning Tools by Varsity Tutors