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3 years ago

Substitution solve for x & y-4x - 2y equals 14-10x+7y=-25

Physics

1 answer:

den301095 [7]3 years ago

8 0

Answer:

-4×-2y=14 (1)

-10×+7y=-25 (2)

multiplying eq 1 by 7 and eq 2 by 2 and add eq. 1 and 2

-28×-14y=98

-20×+14y=-50

___________

-28×=48

×=48/-28

×=-12/7

now

-4×-2y=14

-4*-12/7-2y=14

48/7-2y=14

-2y=14-48/7

-2y=(98-48)/7

-2y=50/7

y=-50/14

y=-25/7

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3 years ago

Substitution solve for x & y-4x - 2y equals 14-10x+7y=-25​

Substitution solve for x & y-4x - 2y equals 14-10x+7y=-25