Answer:
Step-by-step explanation:
3x + 1 = 7 - 3x
3x + 3x = 7 - 1
6x = 6
x = 6/6
x = 1
x=1
1) 3x+1=7-3x
2) 6x+1=7
3) 6x=6
4) x=1
