Question 1157227
Let wife's age = {{{ x }}}
My age is {{{ x + 5 }}}
Daughter's age is {{{ (1/2)*x }}}
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given:
{{{ x + x + 5 + (1/2)*x = 100 }}}
{{{ 2x + ( 1/2 )*x = 95 }}}
{{{ 4x + x = 190 }}}
{{{ 5x = 190 }}}
{{{ x = 38 }}}
and
{{{ x+ 5 = 43 }}}
and 
{{{ (1/2)*x = 19 }}}
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Wife is 38
I am 43 
Daughter is 19
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check:
{{{ x + x + 5 + (1/2)*x = 100 }}}
{{{ 38 + 43 + 19 = 100 }}}
{{{ 100 = 100 }}}
OK