Question 1046040
Let {{{ n }}} = number of years from now
when mother's age is 4 more than twice
daughter's age
{{{ 40 + n  = 2*( 14 + n ) + 4 }}}
{{{ 40 + n = 28 + 2n + 4 }}}
{{{ 40 + n = 2n + 32 }}}
{{{ n = 8 }}}
8 years from now
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check:
{{{ 40 + n  = 2*( 14 + n ) + 4 }}}
{{{ 40 + 8  = 2*( 14 + 8 ) + 4 }}}
{{{ 48 = 2*22 + 4 }}}
{{{ 48 = 44 + 4 }}}
{{{ 48 = 48 }}}
OK