Question 1119089
{{{system(m=4d,m+4=3(d+4))}}}


{{{4d+4=3d+12}}}
{{{d=12-4}}}
{{{d=8}}}-----daughter now
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{{{m=32}}}----mother now



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what is Sarah's age when her daughter is half her age?
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In how many more years, y?
{{{(1/2)(32+y)=8+y}}}

{{{32+y=2(8+y)}}}

{{{y+32=2y+16}}}

{{{highlight_green(y=16)}}}-------how many years from now

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Sarah will be  {{{32+16=highlight(48)}}}.