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yarik20156
@yarik20156
August 2022
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3Х-2У=-8 2Х+У=-3 решите графически дам 15 б
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3x-2y=-8
y=-3-2x
3x-2*(-3-2x)=-8
3x+6+4x=-8
3x+4x=-8-6
7x=-14
x=-2
Подставляем во 2 уравнение сверху, чтобы найти y
2*(-2)+y=-3
-4+y=-3
y=-3+4
y=1
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Answers & Comments
y=-3-2x
3x-2*(-3-2x)=-8
3x+6+4x=-8
3x+4x=-8-6
7x=-14
x=-2
Подставляем во 2 уравнение сверху, чтобы найти y
2*(-2)+y=-3
-4+y=-3
y=-3+4
y=1