Answer:
d
Explanation:
Given
3x - x + 2 = 12, that is
2x + 2 = 12 ( subtract 2 from both sides )
2x = 10 ( divide both sides by 2 )
x = 5
3x-x+2=12
2x+2=12
2x = 10
x=5
5.2m questions
6.7m answers