40
8x5=40
10x4=40
Hope this helps
9/2{8-x}+36=102-5/2{3x+24}
you first use 9/2 to open brackets
9/2*8=36,
9/2*x=9/2x
36-9/2x=102-5/2{3x+24}
5/2*3x=15/2x+60
36-9/2x=-15/2x-60
36+60=15/2x+9/2x
96=12x you then divide and the answer obtained will be 8.
x=8
B has two pre-images of -7 so it is not a function
4(8x-2)
Distribute the 4
So it should be 32x-8
Hope it helps