12 – [17 – {16-(18- 6+3 - 12)}]
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3
Answer:
8
Step-by-step explanation:
12 - [ 17 - { 16 - ( 18 - 6 + 3 - 12 ) } ]
→ 12 - [ 17 - { 16 - ( 18 + 3 - 6 - 12 ) } ]
→ 12 - [ 17 - { 16 - ( 21 - 18 ) } ]
→ 12 - [ 17 - { 16 - ( 3 ) } ]
→ 12 - [ 17 - { 16 - 3 } ]
→ 12 - [ 17 - { 13 } ]
→ 12 - [ 17 - 13 ]
→ 12 - [ 4 ]
→ 12 - 4
→ 8
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