4 years ago

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

1 answer:

4 0

$8x+y=-16 \ \ \ |\times (-1) \\
-3x=-5-y \\ \\
-8x-y=16 \\
\underline{-3x+y=-5} \\
-8x-3x=16-5 \\
-11x=11 \\
x=-1 \\ \\
8x+y=-16 \\
8 \times (-1)+y=-16 \\
-8+y=-16 \\
y=-16+8 \\
y=-8 \\ \\ x=-1 \\ y=-8$

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