Question

3b - 4(b +5) = 12b -20

Answer 1

Resposta:

$3b - 4(b +5) = 12b -20\\\\3b-4b-20=12b-20\\\\-b-20=12b-20\\\\-b-20+20=12b-20+20\\\\-b=12b\\\\-b-12b=12b-12b\\\\-13b=0\\\\\frac{-13b}{-13}=\frac{0}{-13}\\\\b=0$

Answer 2

Resposta:0

Explicação passo a passo:3b-4(b+5)=12b-20

3b -4b -20=12b -20

-b-12b-20+20=0

-13b+0=0

B=0/-13

B=0