On the bottom left, the answer is subtraction property of equality because you need to subtract 4x to the 7x to simplify the equation.
48: 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
54: 1, 2, 3, 6, 9, 18, 27, 54
gcf: 6
1/2bh
1/2b4 = 18
b4= 36
b= 9 yards
Answer:
-20...........................
