Question

– 2x – 20 + 20 = 100 – 20 ​

Answer 1

Resposta:

x=-40

Explicação passo-a-passo:

-2x=100+20-20-20

-2x=120-40

-2x=80(-1)

2x=-80

x=-80/2

x=-40

Answer 2

– 2x – 20 + 20 = 100 – 20 

-2x + 20 = 100

-2x = 100 - 20

-2x = 80

x = - 80/2

x = - 40

Verificando...

-2x - 20 + 20 = 100 - 20

-2× - 40 - 20 + 20 = 100 - 20

Certo.