Question

ashur solves the following system of linear euations. -3a + 7b = -16. -9a + 5 b = 16 which statement is true about the solution to this system of equations?

Answer 1

They both are equal to -4.

Explanation:

Just took the test and got it right hope this helps. :)

Answer 2

a=-4, b=-4. (-4, -4).

Explanation:

-3a+7b=-16

-9a+5b=16

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-3(-3a+7b)=-3(-16)

-9a+5b=16

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9a-21b=48

-9a+5b=16

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-16b=64

b=64/-16

b=-4

-3a+7(-4)=-16

-3a-28=-16

-3a=-16+28

-3a=12

a=12/-3

a=-4