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MsVezhnevets
@MsVezhnevets
August 2021
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Номер 2, срочно пожалуйста
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jekadva
2x-3y=9 /*7 14x-21y=63
7x+5y=16 /*2 14x+10y=32 -31y=31 y=-1
2x-3*(-1)=9
2x+3=9
2x=6
x=3
ответ(3;-1)
=============
4x+2y=3 /*6 24x+12y=18
6x-4y=5 /*4 24x-16y=20 28y=-2 y=-1/14
4x+2*(-1/14)=3
4x-1/7=3
4x=3 1/7
x=22/7*1/4
x=11/14
ответ(11/14;-1/14)
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Answers & Comments
7x+5y=16 /*2 14x+10y=32 -31y=31 y=-1
2x-3*(-1)=9
2x+3=9
2x=6
x=3
ответ(3;-1)
=============
4x+2y=3 /*6 24x+12y=18
6x-4y=5 /*4 24x-16y=20 28y=-2 y=-1/14
4x+2*(-1/14)=3
4x-1/7=3
4x=3 1/7
x=22/7*1/4
x=11/14
ответ(11/14;-1/14)