Elimination method please solve

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asked Jul 11, 2020 229k views

3 votes

Elimination method please solve

Mathematics
middle-school

Anuvrat Parashar asked

by Anuvrat Parashar

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

Abdul Hannan Ijaz answered Jul 15, 2020

by Abdul Hannan Ijaz

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