Write and solve a revised system -5x-2y=6 3x+6y=6

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asked Jul 18, 2016 221k views

4 votes

Write and solve a revised system
-5x-2y=6
3x+6y=6

Mathematics
high-school

Cohars asked

by Cohars

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1 Answer

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$\left \{ { *3 \atop {3x+6y=6}} \right. \\\\ \left \{ {{-15x-6y=18} \atop {3x+6y=6}} \right. \\+----\\addition\\\\ -12x=24 \ \ \ \ | divide\ by\ -12\\\\ x=-2\\\\ 2y=-5x-6\ \ \ | divide\ by\ 2\\\\ y=(-5x-6)/(2)\\\\ y=(-5*(-2)-6)/(2)=(4)/(2)=2$

Shmwel answered Jul 23, 2016

by Shmwel

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