Respuesta :

Answer:

Step-by-step explanation:

8(x+9)=100

8x+72=100

100-72=28

8x=28

x=3.5

Answer:

  x= 3.5

Step-by-step explanation:

8(x+9) = 100

8x + 72 =72

100- 72= 28

28/8x= 3.5