Question

Prove the mathematical solution 45-45=45

Answer 1

(9+8+7+6+5+4+3+2+1)
-(1+2+3+4+5+6+7+8+9)
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→8+6+4+1+9+7+5+3+2
→45

Answer 2

( 9+8+7+6+5+4+3+2+1) -1+2+3+4+5+6+7+8+9
45-45 =45