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Roma2281
@Roma2281
July 2022
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решите пж два уравнения
1) Iх+5I-2=7
2) I3х-9I=6
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ник3709
1) |х+5|-2=7;
|х+5|=7+2;
|х+5|=9;
х+5=9; х=9-5; х=4.
-(х+5)=9;
х+5=-9; х=-9-5; х=-14.
2) |3х-9|=6;
3х-9=6; 3х=6+9; 3х=15; х=5.
-(3х-9)=6;
3х-9=-6; 3х=-6+9; 3х=3; х=1.
2 votes
Thanks 1
konstantinovaz
Прямых скобок не нашла, так что так
1) (х+5)=9
х+5=9 или х+5= -9
х=4 или = -14
2) 3х-9 = -6 или 3х-9 = 6
3х = 3 или 3х = 15
х = 1 или х = 5
1 votes
Thanks 1
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Answers & Comments
|х+5|=7+2;
|х+5|=9;
х+5=9; х=9-5; х=4.
-(х+5)=9;
х+5=-9; х=-9-5; х=-14.
2) |3х-9|=6;
3х-9=6; 3х=6+9; 3х=15; х=5.
-(3х-9)=6;
3х-9=-6; 3х=-6+9; 3х=3; х=1.
1) (х+5)=9
х+5=9 или х+5= -9
х=4 или = -14
2) 3х-9 = -6 или 3х-9 = 6
3х = 3 или 3х = 15
х = 1 или х = 5