Question

Solve system by elimination
9x-3y=3
3x+8y=-17

Answer 1

multiply 2nd equation by -3 and add to first

9x-3y=3
-9x-24y=51+
0x-27y=54

-27y=54
divide both sides by -27
y=-2

sub back
3x+8y=-17
3x+8(-2)=-17
3x-16=-17
add 16 to both sides
3x=-1
divide 3
x=-1/3


(x,y)
(-1/3,-2)