3 years ago

Please help and show work y=-8x y=-4-10x

1 answer:

Nutka1998 [239]3 years ago

7 0

{ y=-8x
{ y=-4-10x

Substitution Method:

-8x=-4-10x
x=-2

y=-8(-2)
y=16

(x,y) = (-2,16)

Check solution
{ 16=-8(-2)
{ 16=-4-10(-2)

{ 16=16
{ 16=16

Elimination Method:

{ 8x+y=0
{ 10x-y=-4

{ 8x+y=0
{ -10x-y=4

-2x=4
x=-2

8(-2)+y=0
y=16

(x,y) = (-2,16)

*For checking, its the same with the substitution method

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