Question

The formula for the perimeter of a rectangle is P=2l+2w. Which is the equivalent equation solves for w?

Answer 1

P = 21 + 2w

Solve for w

Subtract 21 from both sides.

P - 21 = 2w

Divide both sides by 2.

$\frac{P-21}{2}$ = w

The first option is correct.