High School Math : How to solve one-step equations with fractions in pre-algebra

Study concepts, example questions & explanations for High School Math

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Example Questions

Example Question #11 : How To Solve One Step Equations With Fractions In Pre Algebra

What is ?

Possible Answers:

Correct answer:

Explanation:

To get rid of a fraction, we multiply by the reciprocal. So we take  and multiply both sides by :

Notice that  and  cancel out, leaving us with .

At this point, you can either plug  into your calculator, or you can solve this in pieces. 

We can do some manipulation to get: 

, so we can plug that into .

Example Question #12 : How To Solve One Step Equations With Fractions In Pre Algebra

What is ?

Possible Answers:

Correct answer:

Explanation:

To get rid of a fraction, we multiply by the reciprocal, so we take  and multiply both sides by :

Since , we can simplify that equation to .

Therefore, .

Example Question #13 : How To Solve One Step Equations With Fractions In Pre Algebra

What is ?

Possible Answers:

Correct answer:

Explanation:

To get rid of a fraction, we multiply by the reciprocal. So we take  and multiply both sides by :

Since , we can simplify that equation to .

Therefore, .

Example Question #14 : How To Solve One Step Equations With Fractions In Pre Algebra

What is 

Possible Answers:

Correct answer:

Explanation:

To get rid of the , we multiply both sides by :

Example Question #15 : How To Solve One Step Equations With Fractions In Pre Algebra

What is ?

Possible Answers:

Correct answer:

Explanation:

To solve this problem we need to reduce . Both the top and the bottom of  are divisible by , so we can reduce it to . Anything divided by  is itself, so is the same as .

Example Question #16 : How To Solve One Step Equations With Fractions In Pre Algebra

What is ?

Possible Answers:

Correct answer:

Explanation:

To solve, multiply the right side: 

Example Question #17 : How To Solve One Step Equations With Fractions In Pre Algebra

What is ?

Possible Answers:

Correct answer:

Explanation:

To solve this problem, multiply across: .

 is a prime number, so we cannot reduce further. From here, covert  into a mixed fraction:

Example Question #18 : How To Solve One Step Equations With Fractions In Pre Algebra

What is ?

Possible Answers:

Correct answer:

Explanation:

To solve this problem, multiply across:

Example Question #19 : How To Solve One Step Equations With Fractions In Pre Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

Example Question #20 : How To Solve One Step Equations With Fractions In Pre Algebra

Solve for .

Possible Answers:

Correct answer:

Explanation:

To solve for , we need to isolate our variable. That means that we want ONLY the  on the left side of the equation.

We want to divide by . The way you divide by a fraction is to multiply by the reciprocal. The reciprocal of  is .

Therefore:

Since , we can ignore it.

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