Question

Which of the following statements explains how to solve for l using the formula A = lw, when A = 28 and w = 2? Divide 28 by 2. Divide 2 by 28. Multiply 28 by 2. Subtract 2 from 28.

Answer 1

This is the original answer or question

Which of the following statements explains how to solve for l using the formula A = lw, when A = 28 1/4 and w = 2 1/2?

A Subtract 2 1/2 from 28 1/4.

B Divide 2 1/2 by 28 1/4.

C Multiply 28 1/4 by 2 1/2.

D Divide 28 1/4 by 2 1/2.

Answer: D

Answer 2

Divide 28 by 2

Explanation:

When the variable of interest is multiplied by something, you undo that multiplication by dividing the equation by that something.

Here, l is multiplied by 2, so the solution is found by dividing ...

... 28 = l·2

by 2 to get ...

... 28/2 = l

That is, you divide 28 by 2 to find l.