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AlinaTsurskaya9
@AlinaTsurskaya9
June 2022
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Решите систему уравнений:
{3(x+y)+1=x+4y
{7-2(x-y)=x-8y
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lera220203
3(x+y)+1=x+4y7-2(x-y)=x-8y3x+3y+1-x-4y=07-2x+2y-x+8y=02x-y+1=0-3x+10y+7=02x-y=-1-3x+10y=-7-y=-1-2x-3x+10y=-7y=1+2x-3x+10(1+2x)=-7-3x+10+20x=-717x=-17x=-1y=1+2*(-1)y=1-2y=-1
4 votes
Thanks 3
lera220203
я помогла?
AlinaTsurskaya9
Да, огромное спасибо!
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