SOLUTION: a rectangle has an area of 84 square feet. the width is x and the length is x+5. find the dimension of the rectangle.

Question 1153785: a rectangle has an area of 84 square feet. the width is x and the length is x+5. find the dimension of the rectangle.
Found 2 solutions by josgarithmetic, math_helper:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!

If you want a longer way, you can try , and solve as the quadratic equation.
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!

Method 1:
Look for factors of 84 that have a difference of 5:
84 =
4*21
6*14
7*12 <--- width is 7, length is 12

Method 2:
Solve algebraically.

// Note that method 1 is basically the same as factoring this expression
--> x = 7 (width) and x + 5 = 12 (length)

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