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Question

Verify the following:
(a) 18×[7+(3)]=[18×7]+[18×(3)]
(b) (21)×[(4)+(6)]=[(21)×(4)]+[(21)×(6)]

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Solution

(a) LHS =18×[7+(3)]=18×4=72
RHS =[18×7]+[18×(3)] =126+(54)=72 (verified)

(b) LHS =(21)×[(4)+(6)]=(21)×(10)=210
RHS =[(21)×(4)]+[(21)×(6)]=84+126=210 (verified)

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