linear system

is (2,-3) the solution for the following linear system. 3x+6y=-12 and 2y-8x=-22
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1 Answer

line 1: 3x +6y =-12 or x+2y=-4  or  y=-(x/2) -2

line 2: -8x +2y =-22  or -4x +y =-11  or y=4x-11

y=4x-11 =-(x/2)-2...become 8x -22 =-x-4

or 8x+x=22-4

9x=18

x=2

y=4x-11...y=8-11=-3

kommon point is (2, -3)
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