SOLUTION: the length of a rectangle is 5 cm less than three times its width. the area is 112 sq. cm. write an equation that can be used to find the length of the sides of the rectangle.and s

Algebra ->  Rectangles -> SOLUTION: the length of a rectangle is 5 cm less than three times its width. the area is 112 sq. cm. write an equation that can be used to find the length of the sides of the rectangle.and s      Log On


   

Question 853741: the length of a rectangle is 5 cm less than three times its width. the area is 112 sq. cm. write an equation that can be used to find the length of the sides of the rectangle.and solve for x and find the perimeter of the rectangle
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x and y for length and width.
x=-5%2B3y, the first sentence.
xy=112, the second sentence.

Substitute for x into the area equation and solve for y. Use this solution to find the value for x. Then use perimeter formula, p for perimeter; p=2x%2B2y.