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The givenexpression15 - 3[2 + 6(-3)] can besimplifiedin order to get the value of 63.Given an expression:15 - 3[2 + 6(-3)]It is required to find thevalueof the expression by simplifying it.Here, there is more than one operation.So, theBODMASor PEMDAS principle has to be used.First, the elements in thebracketshave to be simplified first.Consider the operations in the bracket.2 + 6(-3)Multiplicationshould be done first.2 + (-18)After theaddition, the value is -16.So, the whole expression becomes:15 - 3(-16)Multiply first by the rule.15 - (-48)Thenegative signsbecome positive.So, 15 + 48 = 63Hence, the value of the expression is 63.Learn more aboutBODMAS Rulehere :brainly.com/question/16738857#SPJ6...