Simplify: 50 - [10 - {70 – (9-8 ÷ 4)}]
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First we'll simplify the first parenthesis by following the BODMAS RULE: 50-[10-{70- (9-8÷4)}]
=50-[10-{70-(9-2)}]
=50-[10-{70-7}]
= 50-[10-63]
=50-[-53]. (-×-=+)
=50+53
103
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