Tìm x a) x + 6,9 = 65,2 – 38,49 b) x x 5 = 0,15 + 3,7

$\text{a) x + 6,9 = 65,2 - 38,49}$

$\text{x + 6,9 = 26,71}$

$\text{x = 26,71 - 6,9}$

$\text{x = 19,81}$

$\text{Vậy x = 19,81}$

$\text{X x 5 = 0,15 + 3,7}$

$\text{X x 5 = 3,85}$

$\text{X = 3,85 : 5}$

$\text{X = 0,77}$

$\text{Vậy x = 0,77}$