8 * 4 = (A * 7) - (A * 3)

32 = (A*7) - (A*3) = 32 also ... Let's figure out what A = to solve this. First, we need to figure out a number, multiplied by 7 and 3, and subtracted both to get 32, I would guess 7, 7 x 7 equals 49 and 7 x 3 = 21, so 49-21 = 28. We are very close to 32, we can guess the number 8, 8 x 7 = 56, then 8x3=24, so 56-24 = 32 So A = 8 because 56-24 = 32 and they are correct in multiplication, numbers, and subtracting both.