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Настюха33333
@Настюха33333
June 2022
1
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СРОЧНО!!!!!
20 БАЛЛОВ!!!!
Решите уравнения:
1)5*(3х+1,2)+х=68
2)0,4b+3=0.2*(3b+1)-b
3)6*(х-1)=9,4-1,7х
4)3,5-9а=2*(0,5а-4)
5) 3*(2,4-1,1m)=2,7m+32
БЕЗ ПРОВЕРКИ!!!
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Answers & Comments
lenok9999
1) 5*(3x+1.2)+x=68
15x+6+x=68
15x+x=68-6
16x=62
x=3.875
2) 0.4b+3=0.2*(3b+1)-b
0.4b+3=0.6b+0.2-b
0.4b-0.6b+b=0.2-3
0.8x=-2.8
x=-3.5
3) 6*(x-1)=9.4-1.7x
6x-6=9.4-1.7x
6x+1.7x=9.4+6
7.7x=15.4
x=2
4) 3.5-9a=2*(0.5a-4)
3.5-9a=a-8
-9a-a=-8-3.5
-10a=-11.5
a=1.15
5)3*(2.4-1.1m)=2.7m+32
7.2-3.3m=2.7m+32
-3.3m-2.7m=32-7.2
-6m=24.8
m=-4
6) 5*(3x+1.2)+x=6.8
15x+6+x=6.8
15x+x=6.8-6
16x=0.8
x=0.05
3 votes
Thanks 3
Настюха33333
А можете: 5*(3х+1,2)+х=6,8
lenok9999
готово
Настюха33333
где?
Настюха33333
там 68,а мне надо 6,8
lenok9999
я его шестым написала
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Answers & Comments
15x+6+x=68
15x+x=68-6
16x=62
x=3.875
2) 0.4b+3=0.2*(3b+1)-b
0.4b+3=0.6b+0.2-b
0.4b-0.6b+b=0.2-3
0.8x=-2.8
x=-3.5
3) 6*(x-1)=9.4-1.7x
6x-6=9.4-1.7x
6x+1.7x=9.4+6
7.7x=15.4
x=2
4) 3.5-9a=2*(0.5a-4)
3.5-9a=a-8
-9a-a=-8-3.5
-10a=-11.5
a=1.15
5)3*(2.4-1.1m)=2.7m+32
7.2-3.3m=2.7m+32
-3.3m-2.7m=32-7.2
-6m=24.8
m=-4
6) 5*(3x+1.2)+x=6.8
15x+6+x=6.8
15x+x=6.8-6
16x=0.8
x=0.05