Problema Solution
For a rectangle with a length of 3x+4 and a perimeter of 10x+18, what is the width of the rectangle?
Answer provided by our tutors
let
l = 3x + 4 the length of the rectangle
w = the width of the rectangle
P = 2(l + w) is the perimeter of the rectangle and A = 10x+18
2(l + w) = 10x + 18
2((3x + 4) + w) = 10x + 18 divide both sides by 2
(3x + 4) + w = 5x + 9
w = 5x + 9 - 3x - 4
w = 2x + 5
the width of the rectangle is 2x + 5.