SOLUTION: The length of a rectangle is 3 in. More than its width. The perimeter of the rectangle is 30 in. A. Define a variable for the width . B. Write an expression for the lengt

Algebra ->  Equations -> SOLUTION: The length of a rectangle is 3 in. More than its width. The perimeter of the rectangle is 30 in. A. Define a variable for the width . B. Write an expression for the lengt      Log On


   

Question 1003040: The length of a rectangle is 3 in. More than its width. The perimeter of the rectangle is 30 in.
A. Define a variable for the width .
B. Write an expression for the length in terms of the width. C. Write an equation to find the width of the rectangle. Solve your equation.
D. What is the length of the rectangle?


Algebra equations
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
A. Define a variable for the width .
x, length
y, width

B. Write an expression for the length in terms of the width. C. Write an equation to find the width of the rectangle. Solve your equation.

x=3%2By
-
2x%2B2y=30
highlight%282%28y%2B3%29%2B2y=30%29

D. What is the length of the rectangle?
Solve for y and use it to evaluate x.