Simplify : 20 - [ 8 - { 5+ 4+ ( 6-5 + 1 ) -2 } ]
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Answer:
= 21
Step-by-step explanation:
20 - [ 8 - { 5 + 4 + ( 6 - 5 + 1 ) - 2 } ]
20 - [ 8 - { 5 + 4 + 2 - 2 } ]
20 - [ 8 - { 9 + 0 } ]
20 - [ 8 - 9 ]
20 - [ - 1 ]
20 + 1
= 21
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