Question

1. – 7х = - 21
2. 3х+5=2(х+1)
3. 9х + (6 – 2х) = 15
4.3(х+2)+2(х – 1)=4(х+3)
5.5(х+1,2) – 2(1,1х+1)=2,3х+0,4

Answer 1

Ответ:

1. x = 3

2. x = -5 +2

x = -3

3. 7x = - 9

x = - 9/7

4. 3x + 6 + 2x - 2 = 4x + 12

x = 8

5. 5x + 6 - 2,2 x + 2 = 2,3 x + 0,4

4,9 x = 7,6

x = 7,6/4,9

Объяснение: