Pre-Algebra : One-Step Equations

Study concepts, example questions & explanations for Pre-Algebra

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Example Questions

Example Question #31 : One Step Equations With Fractions

Solve:  

Possible Answers:

Correct answer:

Explanation:

Divide  on both sides.  This is also similar to multiplying both sides by .

Example Question #41 : One Step Equations With Fractions

Solve:  

Possible Answers:

Correct answer:

Explanation:

Multiply both sides by the reciprocal of the coefficient in front of  to isolate the variable.

By multiplying the reciprocal of the coefficient in front of , we can see that that  can be left as a single variable.

Multiply the whole number with the numerator.

The answer is:  

Example Question #41 : One Step Equations With Fractions

Solve for the unknown variable:  

Possible Answers:

Correct answer:

Explanation:

To isolate the unknown variable, multiply both sides by , which is the reciprocal of the coefficient in front of the  variable.

The left side of the equation will become .  On the right side of the equation, multiply the integer with the numerator of the fraction.

The answer is:

Example Question #42 : One Step Equations With Fractions

Solve:  

Possible Answers:

Correct answer:

Explanation:

In order to isolate the  variable, first multiply both sides by the reciprocal of 

Cancel out the fractions on the left side of the equation.

For these two fractions, multiply the numerator with the numerator, and the denominator with the denominator.

Example Question #42 : One Step Equations With Fractions

Solve:  

Possible Answers:

Correct answer:

Explanation:

In order to isolate the  variable, multiply both sides by the reciprocal of the coefficient in front of the .

Simplify the fractions on the left side.

Reduce the  on the denominator with the  in the numerator.

 

Example Question #43 : One Step Equations With Fractions

Solve:  

Possible Answers:

Correct answer:

Explanation:

In order to isolate the  variable, multiply the reciprocal of  on both sides of the equation.

Simplify the fractions on the left side of the equation.  

Multiply the three with the seven on the right side of the equation.

Example Question #44 : 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 #45 : 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 #46 : 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,

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