# math

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a group of 9 people spent \$78 to go to the movies.adult tickets cost\$10 each and student tickets cost \$8 each.How many adult tickets were purchased?

• math -

Let x = adult tickets and y = student ones.

x = 9 - y

10x + 8y = 78

Substitute 9-y for x in second equation and solve for y. Insert that value into the first equation and solve for x. Check by inserting both values into the second equation.

• math -

6 Student tickets X \$8.00 = \$48.00

\$78.00 minus the \$48.00 = \$30.00

• math -

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