а) 3х +1 = 2х - 5 б) 2(х + 7) = 2х + 14 в) 3(х - 1) - 3(5 +х) = 7. Created by lfv2018. algebra-ru

а) 3х +1 = 2х - 5 б) 2(х + 7) = 2х + 14 в) 3(х - 1)

Verified answer

3x + 1 = 2x - 5
3x - 2x = - 5 - 1
x = - 6

2(x + 7) = 2x + 14
2x + 14 = 2x + 14
2x - 2x = 14 - 14
0x = 0
Уравнение имеет бесчисленное множество решений

3(x - 1) - 3(5 + x) = 7
3x - 3 - 15 - 3x = 7
0x = 7 + 3 + 15
0x = 25
Уравнение не имеет решений

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