Question 1057479
Let {{{ x }}} = his present age
{{{ x + 8 }}} = his age in 8 yrs
{{{ x - 4 }}} = his age 4 yrs ago
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{{{ x + 8 = 3*( x - 4 ) }}}
{{{ x + 8 = 3x - 12 }}}
{{{ 2x = 20 }}}
{{{ x = 10 }}}
He is 10 now
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check:
In 8 yrs he will be 18
4 yrs ago he was 6
{{{ 3*6 = 18 }}}
OK