Question 126387
{{{m}}} = my age now
{{{d}}} = my daughter's age now
{{{m = 26 + d}}}
add {{{-d}}} to both sides
{{{m - d = 26}}}
multiply both sides by 2
{{{2m - 2d = 52}}}
{{{3m + 2d = 103}}}
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add these equations
{{{5m = 155}}}
{{{m = 31}}}
{{{m = 26 + d}}}
{{{31 = 26 + d}}}
{{{d = 31 - 26}}}
{{{d = 5}}}
I am 31 and my daughter is 5
check answers
{{{3m + 2d = 103}}}
{{{3*31 + 2*5 = 103}}}
{{{93 + 10 = 103}}}
{{{103 = 103}}}
OK