SOLUTION: A rectangle's length is seven centimeters more than its width. The rectangle's area is 78 square centimeters. What is its length?

Question 606865: A rectangle's length is seven centimeters more than its width. The rectangle's area is 78 square centimeters. What is its length?
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
For some of these area problems it helps to try factoring 78 before doing anything else. Since 78 = 6*13, and 13 = 6+7, we know right away this works. Therefore the length is 13 cm.

Or you can let L be the length, then L-7 is the width (since the length is 7 cm longer). Then L(L-7) = 78. Solve for L.
RELATED QUESTIONS
A rectangle�s length is 2 centimeters more than its width. The area of the rectangle is... (answered by Cromlix)

The length of a rectangle is 4 centimeters less than its width. What are the dimensions... (answered by jim_thompson5910)

the length of a rectangle is seven more than three times its width. It the perimeters is... (answered by tommyt3rd)

the area of a rectangle is 108 square centimeters. if its width is 9 centimeters. what is (answered by Nada)

the length of a rectangle is 5 centimeters more than its width. if the perimeter of the... (answered by Stitch)

The length of a rectangle is 3 centimeters less than its width. What are the dimensions... (answered by ramkikk66)

The length of a rectangle is 3 centimeters less than its width. What are the dimensions... (answered by Alan3354)

the length of a rectangle is 12 centimeters less than its width what are the dimensions... (answered by tenkun)

the length of a rectangle is 6 centimeters less than its width. what are the dimensions... (answered by macston)