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Anonymous
It is an arithmetical statement.
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10 plus 20-2 - 11 plus 3 is equal to 20.
your answer is 20 ( 10+5=15+5=20)
11 plus 5-10 plus 20-9 plus 14-10 is equal to 21
Yes.
it means that x should equal 10. x + x = 20. x = 10