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zhan1205
@zhan1205
July 2022
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математика 975 срочно , надо найти Х
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vasilenkot
1. 5/7=9х+2/28
140=7(9х+2)
140=63х+14
-63х=14-140
-63х=-126
х=2
2. 9/13=5х+2/39
351=13(5х+2)
351=65х+26
-65х=26-351
-65х=-325
х=5
3. 8/19=7х-4/57
456=19(7х-4)
456=133х-76
-133х=-76-456
-133х=-532
х=4
4. 33/45=2х-1/15
11/15=2х-1/15
11=2х-1
-2х=1-11
-2х=-12
х=6
5. 26/38=4х+1/19
13/19=4х+1/19
13=4х+1
-4х=1-13
-4х=-12
х=3
6. 45/51=2х-3/17
15/17=2х-3/17
15=2х-3
-2х=-3-15
-2х=-18
х=9
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annywkawai
Вот надеюсь правильно
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Answers & Comments
140=7(9х+2)
140=63х+14
-63х=14-140
-63х=-126
х=2
2. 9/13=5х+2/39
351=13(5х+2)
351=65х+26
-65х=26-351
-65х=-325
х=5
3. 8/19=7х-4/57
456=19(7х-4)
456=133х-76
-133х=-76-456
-133х=-532
х=4
4. 33/45=2х-1/15
11/15=2х-1/15
11=2х-1
-2х=1-11
-2х=-12
х=6
5. 26/38=4х+1/19
13/19=4х+1/19
13=4х+1
-4х=1-13
-4х=-12
х=3
6. 45/51=2х-3/17
15/17=2х-3/17
15=2х-3
-2х=-3-15
-2х=-18
х=9