Question

3x+9y=-6 ,-4x-12y=8 solve by substitution method​

Answer 1

Answer:

3x+9y=-6 (1)

-4x-12y=8 (2)

let us take x in terms of y in eq 1

3x=-6-9y

x=(-6-9y)/3 (3)

let us put the value of x in eq 2

4((-6-9y)/3)-12y=8

4(3(-2-3y) /3)-12y=8

4(-2-3y) -12y=8

-8-12y-12y=8

-12y-12y=8+8

-24y=16

y=-(16/24)

y=_(2/3)

Answer 2

Answer:

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