3.Angelo took a group of people to the movies and spent $80 on tickets. Adult tickets cost $10 and child tickets cost $6. The equation to represent his cost is 10A + 6C = $80. If there were 5 children in the group, how many adult tickets did he purchase? Show your work and use a complete sentence to explain your solution in the context of the original problem.

Question

anonymous · Answer

10A + 6(5) = $80
10A + $30 = $80
10A = $80 - $30
10A = $50
A = $50/$10
A = 5

There are 5 adults that were purchased.  

Basically you plug the child's tickets in for C and solve for A.  Units cancel on the last step leaving the amount of adult tickets purchased (5).