1)
x=-y
2x + 4y= - 6
2)
x = y -5
2y - x = 12
3)
x + y = 4
2x + 3y = 7
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Answers & Comments
1)
x=-y
2x + 4y= - 6
2)
x = y -5
2y - x = 12
3)
x + y = 4
2x + 3y = 7