The math club and the science club had fundraisers to buy supplies for a hospice. The math club spent $135 buying six cases of juice and one case of bottled water. The science club spent $110 buying four cases of juice and two cases of bottled water. How much did a case of juice cost? How much did a case of bottled water cost?
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You set up the systems of equations like this:
135= 6j + 1w
110= 4j +2w
Then you multiply the top equation by 2 (just multiply both sides by 2)
Subtract the bottom equation from this
270-110= (12j+2w)- (4J+2w)
Then substitute back in to solve for the water.
110= 4(20) + 2w
The price for a case of bottled water was 15$ and the price for a case of juice was 20$
Hope this helps!