Answer:
b=2a-1= 2
b=5a+2= 3
b=8a=1
c.-10
Step-by-step explanation:
4x+2=11
x=9/4...(1)
now,
-4x-1=-4x(9/4)-1=-10
All you have to do is multiply 56x80 and then you get the right answer which is 4480
