Respuesta :

wegnerkolmp2741o

Answer:

b = -2/3

Step-by-step explanation:

Assuming we are solving for b

10(1+3b)+15b= -20

Distribute

10+30b +15b = -20

Combine like terms

10 +45b = -20

Subtract 10 from each side

10-10 +45b= -20-10

45b = -30

Divide by 45

45b/45= -30/45

b = -2/3