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3 years ago

8

Trish is taking care of the hans family dogs. The hans leave 7 cans of dog food for the 3 days theyll be away . How many more ca

ns of dog food would trish need if she needed to feed the dogs 3 cans a day.

1 answer:

myrzilka [38]3 years ago

5 0

If the Hans leave for 3 days, and Tish wants to feed the dogs 3 cans each day, we can solve this problem using simple multiplication.

3 days * 3 cans / 1 day = 9 cans

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While it's pretty obvious to most of us that

-13x=90-2y

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Subtract the 2nd equation from the first:

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-7x = 42. Then x = -42/7, or x = 6.

Now subst. 6 for x in either one of the given equations. Suppose we use the 2nd equation:

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Then -6(6)=48-2y, or -36 = 48 - 2y, or 2y = 48+ 36 = 84. Then y = 42.

The solution is (6, 42).

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