Solve 19 - 81 = 14.
q=-20
q= -18
q = -16
q= -14
q= -12
9 = -10
9 = -8
9 = -6
9 = -4
9 = -2
q=0
a = 2
9 = 4
a = 6
9 = 8
9 = 10
a = 12
9 = 14
9 = 16
9 = 18
9 = 20
9 22
9 = 24
no solution