Answer:
- length 18 units
- width 12 units
Step-by-step explanation:
Let w represent the width of the rectangle. Then the length is w+6, and the perimeter is ...
P = 2(L +W)
60 = 2((w+6) +w) . . . substitute known values
30 = 2w +6 . . . . . . . .divide by 2, collect terms
15 = w +3 . . . . . . . . . divide by 2 again
12 = w
w+6 = 18
The length is 18 units; the width is 12 units.
