A food truck sells salads for $6.50 each and drinks for $2.00

Question

A food truck sells salads for $6.50 each and drinks for $2.00 each. The food truck’s revenue from selling a total of 209 salads and drinks in one day was $836.50. How many salads were sold that day?

A) 77
B) 93
C) 99
D) 105

Answer 1

S = # of salads
d = # of drinks

$6.5s + $2d = $836.5
s + d =209

1. Isolate a variable.

s = 209-d

2. Plug in.

6.5 (209-d) + 2d = 836.5

1358.5 - 6.5d + 2d = 836.5
-4.5d = -522
d = 116

s = 209 - 116 = 93