y=3x
y=-2x-5
3x=-2x-5
3x+2x=-5
5x=-5
x=-5\5
x=-1
y=3x=3*(-1)=-3
ответ: (-1;-3)
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y=3x
y=-2x-5
3x=-2x-5
3x+2x=-5
5x=-5
x=-5\5
x=-1
y=3x=3*(-1)=-3
ответ: (-1;-3)