Question

решите систему уравнений
4x= - 6y
7y-2x=20

Answer 1

4x=-6y
7y-2x=20
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2x+3y=0
-2x+7y=20/+
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10y=20, y=2
2x=-3.2=-6, x=-3
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/x,y/=/-3,2/
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