Respuesta :

Answer:

b = 1

Step-by-step explanation:

-18+4b=7(4)+(7)-(6b)

-18+4b= 28 + (-42b)

4b-16=-42b+28

Add 42b to both sides.

4b-16+42b=-42b+28+42b

46b-18=28

Add 18 to both sides.

46b-18+18=28+18

46b=46

b= 46/46

b=1