8.33333333. You know you can use a calculator.
3 (3 + x) = 5x - 25
9 + 3x = 5x - 25
Add 25 to each side
34 + 3x = 5x
Subtract 3x from each side
34 = 2x
Divide each side by 2
17 = x
Triangle:
A = 3 x 9 x 1/2 = 13.5
Large rectangle (center):
A = 9 x 12 = 108
Medium rectangle:
A = 4 x 6 = 24
Small rectangle (bottom):
A = 4 x 2 = 8
Figure:
A = 13.5 + 108 + 24 + 8 = 153.5 square feet
Hope this helps! :)
