SOLUTION: Mary goes to the market to buy vegetables. The tomatoes are 60 cents per pound and onions are 67 cents per pound. She gets 10 pounds and spends a total of $6.21. How much did she s

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: Mary goes to the market to buy vegetables. The tomatoes are 60 cents per pound and onions are 67 cents per pound. She gets 10 pounds and spends a total of $6.21. How much did she s      Log On

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Question 1009057: Mary goes to the market to buy vegetables. The tomatoes are 60 cents per pound and onions are 67 cents per pound. She gets 10 pounds and spends a total of $6.21. How much did she spend on each vegetable?
Answer by josgarithmetic(39838) About Me  (Show Source):
You can put this solution on YOUR website!
t, tomatos
c, onions (cebollas)

system%28t%2Bc=10%2C0.6t%2B0.67c=6.21%29

60t%2B67c=621
60t%2B67%2810-t%29=621-----substitution using poundage sum equation
60t%2B670-67t=621
-7t%2B670=621
-7t=21-70
7t=49
highlight%28t=7%29
-
highlight%28c=3%29

Go back to use prices to get the cost of each.