Solve this problem by writing and solving an equation. Be sure to define your variable. Homework Help ✎
A rectangle has a perimeter of 30 inches. Its length is one less than three times its width. What are the length and width of the rectangle?
Set up two equations:
3W − 1 = L
2W + 2L = 30
Substitute (3W − 1) for L and solve the equation:
2W + 2 (3W − 1) = 30
Width is 4 inches and length is 11 inches.