math

a box of chalk and 2 staplers costs \$10. 3 boxes of chalk and 2 staplers costs \$18. find total cost of 1 box of chalk and 1 stapler

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1. c + 2s = 10.30
3c + 2s = 18
subtract them
2c = 7.7
c = 3.85
sub back into the first equation to get
3.85 + 2s = 10.3
2s = 6.45
s = 3.23

so c + s = 7.08

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posted by Reiny
2. barmodel

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posted by anna

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