Question 1098561
Ages 3b and b.


{{{(3b-3)=4(b-3)}}}

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{{{3b-3=4b-12}}}
{{{-3+12=b}}}
{{{b=9}}}-------Ben
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{{{27}}}-------Abel


Sum of their ages in 3 years time:
{{{(27+9)+3+3}}}
{{{highlight(42)}}}