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zhan1205
@zhan1205
July 2022
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математика 975 желательно на бумажке и сфоткайте , найдите Х , спасибо за ранее
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candynova
5/7=(9х+2)/28
9х+2=5*28:7
9х+2=20
9х=20-2
9х=18
х=2
9/13=(5х+2)/39
5х+2=9*39 :13
5х+2=27
5х=27-2
5х=25
х=25:5
х=5
8/19=(7х-4)/57
7х-4=8*57:19
7х-4=24
7х=28
х=4
33/45=(2х-1)/15
2х-1=33*15:45
2х-1=11
2х=12
х=6
26/38=(4х+1)/19
4х+1=26*19:38
4х+1=13
4х=12
х=3
45/51=(2х-3)/17
2х-3=45*17:51
2х-3=15
2х=18
х=9
0 votes
Thanks 1
zhan1205
спасибо
гюйс
Verified answer
5/7=(9x+2)/28
7(9x+2)=140
9x+2=20
9x=18
x=2
9/13=)5x+2)/39
39*9=(5x+2)*13
27=5x+2
5x=25
x=5
8/19 = (7x-4)/57
8*57=19*(7x-4)
24=7x-4
7x=28
x=4
33/45=(2x-1)/15
33*15=45*(2x-1)
11=2x-1
2x=12
x=6
26/38 = (4x+1)/19
19*26 = 38*(4x+1)
26 = 2(4x+1)
13=4x+1
4x=12
x=3
45/51=(2x-3)/17
15=2x-3
2x=18
x=9
0 votes
Thanks 1
zhan1205
спасибо
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Answers & Comments
9х+2=5*28:7
9х+2=20
9х=20-2
9х=18
х=2
9/13=(5х+2)/39
5х+2=9*39 :13
5х+2=27
5х=27-2
5х=25
х=25:5
х=5
8/19=(7х-4)/57
7х-4=8*57:19
7х-4=24
7х=28
х=4
33/45=(2х-1)/15
2х-1=33*15:45
2х-1=11
2х=12
х=6
26/38=(4х+1)/19
4х+1=26*19:38
4х+1=13
4х=12
х=3
45/51=(2х-3)/17
2х-3=45*17:51
2х-3=15
2х=18
х=9
Verified answer
5/7=(9x+2)/287(9x+2)=140
9x+2=20
9x=18
x=2
9/13=)5x+2)/39
39*9=(5x+2)*13
27=5x+2
5x=25
x=5
8/19 = (7x-4)/57
8*57=19*(7x-4)
24=7x-4
7x=28
x=4
33/45=(2x-1)/15
33*15=45*(2x-1)
11=2x-1
2x=12
x=6
26/38 = (4x+1)/19
19*26 = 38*(4x+1)
26 = 2(4x+1)
13=4x+1
4x=12
x=3
45/51=(2x-3)/17
15=2x-3
2x=18
x=9