simplify the following expressions [9-{(2÷2-1)×4-7}+6]
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Step-by-step explanation:
=[9-{(2÷2-1)×4-7}+6]
=[9-{(1-1)×4-7}+6]
=[9-{0×-3}+6]
=[9-0+6]
=15
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