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.

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

Step-by-step explanation:

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Step-by-step explanation:

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