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14-02-2017
Mathematics

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-4x - 28y=56 4x + 14y=-28

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Аноним Аноним

14-02-2017

Adding the 2 equations will eliminate x because -4x + 4x = 0
so we get
-14y = 28
y = -2
plug this into the second euqtion:-
4x + 14(-2) = -28
4x - 28 = -28
x = 0

answer is x = 0 , y = -2

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