Question 587367
The number has to begin with {{{2}}}
Let the units digit = {{{n}}}
The value of the number is {{{ 2*10 + n }}}
given:
{{{ 20 + n = 4*( 2 + n ) }}}
{{{ 20 + n = 8 + 4n }}}
{{{ 3n = 20 - 8 }}}
{{{ 3n = 12 }}}
{{{ n = 4 }}}
The number is 24
check:
{{{ 4*(2 + 4) = 24 }}}
OK