1+2-3+4+5-6-7+8-9= -5
Change a - sign to a + sign to get sum 9
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Step-by-step explanation:
1+2-3+4+5-6-7+8-9=-5
=:1+2+4+5+8-3-6-7-9=-5
=:20-25=-5
=: -5=-5
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