Question 994720
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R=cost of rib-eye dinner; S=cost of salmon dinner
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24R+10S=$580.66
10S=$580.66-24R
20S=$1161.32-48R Use this to substitute for 20S below
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17R+20S=$590.81 . Substitute for 20S.
17R+($1161.32-48R)=$590.81
-31R=-$570.51
R=$18.40
ANSWER 1: Rib-eye dinner costs $18.40.
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24R+10S=$580.66
24($18.40)+10S=$580.66
$441.60+10S=$580.66 441.69
10S=$139.06
S=$13.91
ANSWER 2: A salmon dinner costs $13.91.
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CHECK:
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17R+20S=$590.81
17($18.40)+20($13.91)=$590.81
$312.80+$278.20=$590.81
$591=$590.81
19 cent discrepancy from rounding to nearest cent.