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koteikaplys
@koteikaplys
July 2022
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4
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Решите уравнения.
1)5х6х=2211
2)(х-30):2=380
3)12*(60+х)=9600
4)123*х-212=403
5)87100:(870+х)=100
6)100*(1530-х)=53000
7)378+х:7=589
8)648:(7х+4)=27
9)1472:(7+5х)=46
10)(х+413):26=103
11)7,9+7х=5х-5,9
12)3,7+5у=7у+13
Пож с решением )
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мрол1
1)30x=2211
x=2211:30
x=73,7
2)x-30=380:2
x-30=190
x=190+30
x=220
3)720+12x=9600
12x=9600-720
12x=8880
x=8880:12
x=9540
4)123x-212=403
123x= 403+212
123x=615
x=615:123
x=5
5)87100:870+x=100
870+x=87100:100
870+x=871
x=871-870
x=1
6)153000-x=53000
x=153000-53000
x=100000
7)x:7=589-378
x:7=211
x=211•7
x=1477
8)648:7x+4=27
7x+4=648:27
7x+4=27
7x=27-4
7x=23
x=23:7
23
x= —–
7
2
x= 3 —
7
9)1472:7+5x=46
7+5x= 1472:46
7+5x= 32
5x= 32-7
5x=25
x=25:5
x=5
10)x+413:26=103
x+413=103•26
x+413=2678
x=2678-413
x=2265
11)7x-5x=-5,9-7,9
2x=-13,8
x=-13,8:2
x=-9,85
12)5y-7y=13-3,7
-2y=9,3
y=9,3:(-2)
y=14,85
2 votes
Thanks 3
koteikaplys
спасибо
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Answers & Comments
x=2211:30
x=73,7
2)x-30=380:2
x-30=190
x=190+30
x=220
3)720+12x=9600
12x=9600-720
12x=8880
x=8880:12
x=9540
4)123x-212=403
123x= 403+212
123x=615
x=615:123
x=5
5)87100:870+x=100
870+x=87100:100
870+x=871
x=871-870
x=1
6)153000-x=53000
x=153000-53000
x=100000
7)x:7=589-378
x:7=211
x=211•7
x=1477
8)648:7x+4=27
7x+4=648:27
7x+4=27
7x=27-4
7x=23
x=23:7
23
x= —–
7
2
x= 3 —
7
9)1472:7+5x=46
7+5x= 1472:46
7+5x= 32
5x= 32-7
5x=25
x=25:5
x=5
10)x+413:26=103
x+413=103•26
x+413=2678
x=2678-413
x=2265
11)7x-5x=-5,9-7,9
2x=-13,8
x=-13,8:2
x=-9,85
12)5y-7y=13-3,7
-2y=9,3
y=9,3:(-2)
y=14,85