bradensanchez11
Answered

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how do i solve 7x-y=21

Sagot :

it is 3 because we multiply 3 and 7 and we get 21
The answer answer is actually -3 because you divided 7 from 21 and you get 3 then you divided -1 because the y has a negative sing on it and you want it to be positive. That is why the answer is -3
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