Mathematics
thedragonlord
3

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

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(2) Answers
lekshmi

8x + y = -16 -3x + y = -5 / * (-1) 8x + y = -16 3x - y = 5 ------------------ + 11x = -11 / : 11 x = -1 x = -1 -3x + y = -5 x = -1 -3 * (-1) + y = -5 x = -1 3 + y = -5 x = -1 y = -5 - 3 x = -1 y = -8

lyssie11234

[latex]\left\{\begin{array}{ccc}8x+y=-16&/-8x\\-3x+y=-5\end{array}\right\\\left\{\begin{array}{ccc}y=-16-8x\\-3x+y=-5\end{array}\right\\\\substitute\\\\-3x+(-16-8x)=-5\\-3x-16-8x=-5\\-11x-16=-5\ \ \ /+16\\-11x=11\ \ \ \ /:(-11)\\x=-1\\\\\left\{\begin{array}{ccc}x=-1\\y=-16-8x\end{array}\right\\\left\{\begin{array}{ccc}x=-1\\y=-16-8\cdot(-1)\end{array}\right\\\left\{\begin{array}{ccc}x=-1\\y=-16+8\end{array}\right\\\left\{\begin{array}{ccc}x=-1\\y=-8\end{array}\right[/latex]

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