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OpenStudy (anonymous):
2 sandwiches and 1 drink is $10.00. 1 sandwich and 2 drinks is $8.00. How much is each sandwich?
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OpenStudy (anonymous):
2s+1d=10 1s+2d=8 so s=$4.00
OpenStudy (anonymous):
the equation (1)x2 and than -(2) so s=$4.00
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