The answer to the problem is 12
X - y = 5
x = y + 5
y = x - 5
-18a+17b is the answer because you multiply by -1 to each
double every 6 months
in 6 months there would be 250*2 = 500 crickets
in 1 year there would be 500*2 = 1000 crickets
in 1.5 years there would be 1000 *2 = 2000 crickets
in 2 years there would be 2000 *2 = 4000 crickets
