math
posted by Anonymous on .
movie tickets cost $10 for adults and $8 for children. The total sales form 120 tickets was $1120. how many adult tickets were sold?

A + C = 120
10 A + 8 C = 1120
Solve that pair of equations for the two unknowns
C = 120  A
10 A + 960 8A = 1120
2A = 160
A = 80
C = 40