Question 1159333
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It is a &nbsp;<U>joke math problem</U>, &nbsp;for children of the &nbsp;5-th - 6-th grade, &nbsp;which sometimes 
a teacher gives them to &nbsp;"warm up" &nbsp;or to &nbsp;"wake up" &nbsp;their brains.  &nbsp;&nbsp;// &nbsp;&nbsp;(Instead of saying "good morning . . . ").


The first rule is &nbsp;"do not solve an equation".


The second rule is &nbsp;"simply add &nbsp;18 &nbsp;to both sides".


Again, &nbsp;this problem's intention it is to worm children's &nbsp;(and aged people's) &nbsp;brain.


An entertainment kind problem . . .