làm nhanh giúp mik nha !!!

$\text{a) x - 74 = 118}$

$\text{x = 118  + 74}$

$\text{x = 192}$

$\text{Vậy x  = 192}$

$\text{b) 2x = -20 : 10}$

$\text{2x = -2}$

$\text{x = ( -2 )  : 2}$

$\text{x = -1}$

$\text{Vậy x = -1}$