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Solve system by elimination
9x-3y=3
3x+8y=-17

1 Answer

5 votes

\left \{ {{9x-3y=3} \atop 3x+8y=-17\ \ } \right. \\\\ \left \{ {{9x-3y=3} \atop {-9x-24y=51}} \right. \\+----\\addition\ method\\\\ -27y=54\ \ \ | divide\ by\ -27\\ y=-(54)/(27)\\ x=(-17-8y)/(3)=(-17-8*(-(54)/(27)))/(3)=-(1)/(3)
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