Respuesta :

mugabemenanis

Answer:9

Step-by-step explanation: x+4=13

x=13-4

x=9
1st simplify
8x+32=104
2nd subtract 32 from both sides
8x+32=104
-32 -32
3rd simplify
8x=72
4th solve for x
8x=72
divide both sides by 8
x=9