7s+24=N
9s-32=N sovlve for N
then
7 s + 24 = 9 s -32
2 s = 56
s = 28
7(28) + 24 = N = 220
check
9(28) -32 = 200 sure enough
9s-32=N sovlve for N
7 s + 24 = 9 s -32
2 s = 56
s = 28
7(28) + 24 = N = 220
check
9(28) -32 = 200 sure enough