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nastyacherepano
@nastyacherepano
October 2021
2
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не могу решить, при забыла, помогите прошу вас
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drudzko
1)
9-7x-21=5-6x
-7x+6x=5+21-9
-x=17
x=-17
2)
7(x+3)-2(x-4)=14
7x=21-2x=6=14
5x=-13
x=-2,6
3)
x^2+49+14x-x^2-4+4x=15
18x=15-49+4
18x=-30
x=-30\18
x=-1 целая 12/18
2 votes
Thanks 0
RIDER2014
Только 5 не сделал, не получилось
0 votes
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Answers & Comments
9-7x-21=5-6x
-7x+6x=5+21-9
-x=17
x=-17
2)
7(x+3)-2(x-4)=14
7x=21-2x=6=14
5x=-13
x=-2,6
3)
x^2+49+14x-x^2-4+4x=15
18x=15-49+4
18x=-30
x=-30\18
x=-1 целая 12/18