SOLUTION: at lunchtime, the school charity group sold 290 drinks wit a total value of $645. frozen juices cost $2.50 each, while water costs $2 per bottle. how many bottles of water did they

Algebra ->  Customizable Word Problem Solvers  -> Evaluation -> SOLUTION: at lunchtime, the school charity group sold 290 drinks wit a total value of $645. frozen juices cost $2.50 each, while water costs $2 per bottle. how many bottles of water did they      Log On

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Question 987438: at lunchtime, the school charity group sold 290 drinks wit a total value of $645. frozen juices cost $2.50 each, while water costs $2 per bottle. how many bottles of water did they sell?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
j, how many frozen Juices
w, how many bottles of Water

system%28j%2Bw=290%2C2.50j%2B2w=645%29

system%282j%2B2w=580%2C2.5j%2B2w=645%29
Now ready for Elimination Method for first finding j.

2.5j%2B2w-%282j%2B2w%29=645-580
0.5j=65
highlight%28j=130%29

w=290-j
w=290-130
highlight%28w=160%29