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Уравнения:
3(x-1)+x=2x
5(x+4)+x=6
3(x-7)-6x=-x
7-(2x+3)=9
4x+3(x-7)=5
Уравнения:
3(x-1)+x=2x
5(x+4)+x=6
3(x-7)-6x=-x
7-(2x+3)=9
4x+3(x-7)=5
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Verified answer
3х - 3 + х = 2х4х - 2х = 3
2х = 3
х = 1,5
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5х + 20 + х = 6
6х = -20 + 6
6х = - 14
х = - 2 1/3
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3х - 21- 6х = - х
-3х + х = 21
2х = - 21
х = - 10,5
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7 - 2х - 3 = 9
- 2х = 9 - 7 + 3
2х = - 5
х = - 2,5
----------------------------
4х + 3х - 21 = 5
7х = 21 + 5
7х = 26
х = 3 5/7