Question

3(X+2)=10
4X-21=5
11+3(X-1)=15
Помогите пожалуйста

Answer 1

Ответ:

3(x+2) = 10

3x+6 = 10

3x = 10-6

3x = 4

x = 4/3

4x-21 = 5

4x = 21+5

4x = 26

x = 6,5

11+3(x-1) = 15

11+3x-3 = 15

3x = -11+3+15

3x = 7

x = 7/3