Answer:
a = b*4/7
a-b/b
=4b/7 -b /b
=(4b-7b)/7 /b
=-3b/7 / b
cancelling b,
= -3/7
b. 189 square feet
18 X 12 = 216 square feet
4.5 X 3 = 13.5
13.5 X 2 = 27
216 - 27 = 189 square feet
Step-by-step explanation:
-
b=-1
-7+b=-8
Add 7 to each side to isolate b
-7+7+b=-8+7
b = -1
