Respuesta :
I'll only show you one. Try the rest yourself.
1:
x - 4 = 9
Add 4 to both sides,
x-4+4 = 9+4
x = 13
1:
x - 4 = 9
Add 4 to both sides,
x-4+4 = 9+4
x = 13
Answer:
1. x - 4 = 9
x = 9 + 4
x = 13
2. X-12=21
x = 21+12
x = 33
3. 32=X-13
x = 32 +13
x = 45
4. X-12=17
x = 17+12
x = 29
5. -6+x=19
x = 19+6
x = 25
6. X-7=92
x = 92+7
x = 99
7. X-5=12
x = 12+5
x = 17
8. 33=x-35
x = 35 + 33
x = 68
hope it helps!