1. 3x-2=2x+7 2. 2x+5+x=14 3. 7x=x-18 4. 12x-15=-3x 5. 2x-2+5x=9

1) 3x - 2 = 2x + 7
=> 3x- 2x = 7 + 2
=> x = 9

2) 2x + 5 + x = 14
=> 2x + x = 14 - 5
=> 3x = 9
=> x = 3

3) 7x = x - 18
=> 7x - x = 18
=> 6x = 18
=> x = 3

4) 12x - 15 = -3x
=> 12x + 3x = 15
=> 15x = 15
=> x = 1

5) 2x - 2 + 5x = 9
=> 2x + 5x = 9 + 2
=> 7x = 11
=> x = 11/7

1. 3x-2x=7+2
x=9

2. 3x+5=14
3x=14-5
3x=9
x=9/3
x=3

3. 7x-x=-18
6x=-18
x=-18/6
x=-3

4. 12x+3x-15=0
15x-15=0
15x=15
x=15/15
x=1

5. 7x-2=9
7x=9+2
7x=11
x=11/7

semoga membantu!