Question

The equation

P = 2L + 2W
gives the perimeter P of a rectangle whose respective length and width are L and W. Suppose a rectangle has a length of 62 feet. Solve the equation for the width W in feet.

Answer 1

P = 2W +2L

step is keep 2L in one side of equation , and move every thing else to the other side.

In moving any quantity from one side to other, change the sign. ( equivalent of adding or subtracting equal quantity from both sides of equation).

2L = P - 2W

divide both sides by 2:

L = p/2 - w

Step is the same as solving X in equation of 8 = 2X + 16

2X = 8 -16 = 8

X =4 . But, here you solve one variable in terms of other variables.

Explanation: