Question

44x+4x4+x44=1221
Aflati necunoscuta x!
repede

Answer 1

$\overline{44x}+\overline{4x4}+\overline{x44}=1221$

$400+40+x+400+10x+4+100x+40+4=1221$

$111x=1221-888$

$111x=333$

$x=333:111$

$\boxed{x=3}$