Answer:
y = ac / (a - b - c)
Step-by-step explanation:
y(a - b) = c(y + a)
Distribute
ay - by = cy + ac
Subtract cy from both sides
ay - by - cy = ac
Factor out y
y(a - b - c) = ac
Divide both sides by (a - b - c)
y = ac / (a - b - c)
Answer:
30
Step-by-step explanation:
if you take 3+6+9+12 you get 30
56 / 4 = 14 and 44 / 4 = 11, so 14:11
Divide 29.15/265 = 0.11 or 11 percent