Verified answer

Resposta:

x = 99

Explicação passo a passo:

5(x - 9) + 678 = 12(x - 5)

5x - 45 + 678 = 12x - 60

5x + 633 = 12x - 60

5x - 12x = -633 - 60

-7x = -693 .(-1)

7x = 693

x = 693/7

x = 99