Помогите решить

1.x/3 + x-1/2 =4
2.x-1/2=4+2x/3
3.3x-2/5 = 2+x/3
4.x-4/4 - 2 =x/2
5.x+7/6+2=x/3
6.x+9/3 - x-1/5 = 2
7.x-4/2 - x-1/5 = 3