math

hi every one!!!
i dont get this can someone help me !


1. 3x+4 =10
2. 9 =2a-1
3. 5x-2= 3x+4
4. 7-2y=2+3y
5. 12x=6x-6
6. 6-3y= y-2
7. -3a= 4a+7
8. 3+ 4y = 3y-1
9. 2x+4-x=3x-6
10. 2(3+2a)= 6-a+5