$\text{a)}$$\text{2x - 56 = 2² . 3²}$
$\text{2x - 56 = 36}$
$\text{2x = 36+ 56}$
$\text{2x = 92}$
$\text{x = 92 : 2}$
⇒$\text{ x = 46 }$
$\text{b)}$$\text{x - 17 = 35}$
$\text{x = 35 + 17}$
⇒$\text{x = 52}$
no coppy
xin 5*,cảm ơn và ctlhn cho nhóm :>>
