Question

7x + 5y = -13

Answer 1

Answer:

x=14/39, y=-121/39. (14/39, -121/39).

Step-by-step explanation:

7x+5y=-13

-2x-7y=21

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2(7x+5y)=2(-13)

7(-2x-7y)=7(21)

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14x+10y=-26

-14x-49y=147

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-39y=121

y=121/-39

y=-121/39

-2x-7(-121/39)=21

-2x+847/39=21

-2x=21-847/39

-2x=819/39-847/39

-2x=-28/39

2x=28/39

x=(28/39)/2

x=(28/39)(1/2)

x=28/78

simplify

x=14/39