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Решите уровнение 4х-2х+5х=35
7х+2х + 5х =19+21
20-(6х-4х)=12
100+24=6х-4х

4х - 2х + 5х = 35

7х = 35

х = 35 : 7

х = 5

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7х + 2х + 5х = 19 + 21

14х = 40

х = 40 : 14

х = 40/14 = 20/7

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20 - ( 6х - 4х ) = 12

20 - 2х = 12

2х = 20 - 12

2х = 8

х = 8 : 2

х = 4

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100 + 24 = 6х- 4х

124 = 2х

2х = 124

х = 124 : 2

х = 62