Answer:
He can buy 8 bags of chips.
Step-by-step explanation:
first create a equation:
drink's cost + bag of chip's cost(number of chips) = total
2.9 + 1.85x = 17.7
17.7 is the total, 2.9 is the cost of the drink, 1.85 is the cost of a bag of chips, and x is the number of chips.
Solve for x:
2.9 + 1.85x = 17.7
-2.9 -2.9
1.85x = 14.8
1.85 1.85
x = 8
Check:
12.9 + 1.85(8) = 17.7
12.9 + 14.8 = 17.7
17.7 = 17.7