Question

3x + y = 4
-6x - 7y = 1


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Answer 1

3x+y=4 y=4-3x

-6x-7y=1 -6x-7(4-3x)=1

-6x-28+21x=1

15x=1+28

15x=29

x=29/15

y=4-3(29/15)

y=4-87/15

y=60/15-87/15

y=-27