janessa1 janessa1

07-01-2016
Mathematics

contestada

what is -4x+7x=-38 8x+7y=34

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Billymkhoi Billymkhoi

07-01-2016

-4x+7x= -38
⇒ 3x= -38
⇒ x= -38/3

8x+7y= 34
⇒ 8*(-38/3)+ 7y= 34
⇒ 7y= 406/3
⇒ y= (406/3)/7
⇒ y= 58/3.

The final answer is x= -38/3, y= 58/3~

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