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  • 03-12-2019
  • Mathematics
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Elimination method please solve

Elimination method please solve class=

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Tucon
Tucon Tucon
  • 03-12-2019

 

[tex]\displaystyle\\7)\\\\\begin{cases}x-2y=-2\\-x+y=3\\\end{cases}\\\\---------\text{We add Equation 1 to Equation 2.}\\~~~/~~-y=1~~\Big|\cdot(-1)\\\boxed{y=-1}\\\\x-2y=-2\\x=2y-2\\x=2\cdot(-1)-2\\x=-2-2\\\boxed{x=-4}[/tex]

 

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