Bài 2:
$\text{b. 218 - 5 . (x + 8) = 8}$
$\text{ 5 . (x + 8) = 218 - 8}$
$\text{ 5 . (x + 8) = 210}$
$\text{ x + 8 = 210 : 5}$
$\text{ x + 8 = 42}$
$\text{ x = 42 - 8}$
$\text{ x = 34}$
$\text{Vậy x = 34}$
$\text{c. 3 . (x + 6) + 72 = 144}$
$\text{ 3 . (x + 6) = 144 - 72}$
$\text{ 3 . (x + 6) = 72}$
$\text{ x + 6 = 72 : 3}$
$\text{ x + 6 = 24}$
$\text{ x = 24 - 6}$
$\text{ x = 18}$
$\text{Vậy x = 18}$
$\text{d. (x - 15) - 213 = 0}$
$\text{ x - 15 = 0 + 213}$
$\text{ x - 15 = 213}$
$\text{ x = 213 + 15}$
$\text{ x = 228}$
$\text{Vậy x = 228}$
