Pre-Algebra : Pre-Algebra

Study concepts, example questions & explanations for Pre-Algebra

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Example Questions

Example Question #45 : One Step Equations With Fractions

Solve for  in the following equation.

Possible Answers:

Correct answer:

Explanation:

 

When solving for x, we need to get x alone.  To do that, we need to multiply both sides by 4.

 

Multiply through.

 

Simplify.

 

Solution.

Example Question #41 : One Step Equations With Fractions

Find the solution for g.

Possible Answers:

Correct answer:

Explanation:

This is a simple one-step equation. The objective is to solve for g and isolate it on the right side. 

The steps are as follows:

You can check your answer by inserting g into the original equation as follows.

It works!

Example Question #41 : One Step Equations With Fractions

Solve for  in the following equation:

Possible Answers:

Correct answer:

Explanation:

When solving for x, we want to get x to stand alone.  We subtract  from both sides.  We get

We must find a common denominator.  In this case, the lowest common denominator is 4.  So we get

Example Question #47 : One Step Equations With Fractions

Solve for  in the following equation:

Possible Answers:

Correct answer:

Explanation:

When solving for x, we must get x to stand by itself.  Therefore, in the equation

we will add  to both sides.  We get

To add the fractions, we must find a common denominator.  

In this case, it's 15.  

So,

Example Question #42 : One Step Equations With Fractions

Solve for a in the following equation:

Possible Answers:

Correct answer:

Explanation:

When solving for a, we want to get a by itself.  So in the equation,

we must subtract  from both sides.  We get

When subtracting fractions, we need to find a common denominator.  In this case, it's 6.  So,

Now, we subtract the numerators and get

Example Question #851 : Pre Algebra

Solve the following equation:

 

Possible Answers:

None of the above.

Correct answer:

Explanation:

This is a one-step problem in which you need to multiply both sides by  to isolate "x."

You will then get:

The fives cancel and you are left with:

Example Question #852 : Pre Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

Perform the same operation on both sides of the equation.

It will be easier to write the right side of the equation as a fraction.

Now, we add two-fifths to both sides of the equation.

 

Example Question #853 : Pre Algebra

Solve for :

Possible Answers:

Correct answer:

Explanation:

The goal is to isolate the variable on one side.

Divide each side by :

Example Question #854 : Pre Algebra

Solve for :

Possible Answers:

Correct answer:

Explanation:

The goal is to isolate the variable on one side.

Divide each side by :

Example Question #3 : One Step Equations With Decimals

Solve for :

Possible Answers:

Correct answer:

Explanation:

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