Question

The perimeter of a rectangle with length, l and width, w is given by P = 2w + 2l. If the perimeter of a certain rectangle is 78 centimeters and the width is 12 centimeters, what is the length? Please show all of your work.

Answer 1

P = 2w + 2l
Put P=78 and w=12 into the equation
78 = 2 (12) + 2l
78 = 24 + 2l
2l = 54
solve l yourself, only 1 step is left

Answer 2

how

Answer 3

nevermind i got it

Answer 4

..... 2l =54 divide the both sides by 2 and you'll get the answer