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8x+y=-16 -3x=-5-y elimination
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8x+y=-16
-3x=-5-y
elimination

User Ygee
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1 Answer

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8x+y=-16 \ \ \ |* (-1) \\ -3x=-5-y \\ \\ -8x-y=16 \\ \underline{-3x+y=-5} \\ -8x-3x=16-5 \\ -11x=11 \\ x=-1 \\ \\ 8x+y=-16 \\ 8 * (-1)+y=-16 \\ -8+y=-16 \\ y=-16+8 \\ y=-8 \\ \\ x=-1 \\ y=-8
User Hvanbrug
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