Question 1136672
Those given numbers are strange for this kind of exercise.


If changed to:
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Kevin is 3 times as old as Daniel. 4 years ago, Kevin was 5 times as old as Daniel.
How old is Kevin now?
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{{{system(k=3d,k-4=5(d-4))}}}
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{{{k-4=5d-20}}}
{{{5d=k-4+20}}}
{{{5d=k+16}}}
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{{{5d=3d+16}}}
{{{2d=16}}}
{{{d=8}}}
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{{{k=3d}}}
{{{k=3*8}}}
{{{highlight(k=24)}}}