You buy 1 box of dog food and 2 cans of cat food for $25. Your friend buys 2 boxes of dog food and 1 can of cat food for $26.

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26-02-2021
Mathematics

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You buy 1 box of dog food and 2 cans of cat food for $25. Your friend buys 2 boxes of dog food and 1 can of cat food for $26.

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lauralazda1 lauralazda1 · Answer 1 · 2021-02-26T20:30:56+01:00

lauralazda1 lauralazda1

26-02-2021

a = dog food, b = cat food
1a + 2b= 25
2a + 1b = 26
simultaneous equations!!

2a + 4b=50
2a + 1b = 26
subtract from each other

2a - 2a = 0
4b - 1b = 3b
50 - 26 = 24
3b = 24
b = $8

then sub into equation
1a + 2(8) = 25
25-16 = 9

a= $9

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