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I need help on 7, 9, and 12
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I need help on 7, 9, and 12

I need help on 7, 9, and 12-example-1
User Rich Fox
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7) x=10, y= -10
9) has no solution
12) x= -3 y= 1

I need help on 7, 9, and 12-example-1
User Josef Reichardt
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