If 5 basketballs and a soccer ball cost $340 and 3 basketballs and 2 soccer balls cost $260, then how much does 1 basketball cost and 1 soccer ball cost?
5b +s =340 and
3b +2s = 260 Multiply 1sr equation by -2 and add to second equation to get
-7b = -420
b = 60 then 5(60) + s = 340 shows s = 40 ....you can finish !