Respuesta :
First multiply
30 + 30 × b = 100
30b + 30 = 100
subtract 30 from each side
30b = 70
divide each side by 30
b = 70/30 = 7/3 = 2 1/3
30 + 30 × b = 100
30b + 30 = 100
subtract 30 from each side
30b = 70
divide each side by 30
b = 70/30 = 7/3 = 2 1/3