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Solve: 6(21 ÷ 3) - (4 x 5)

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answer is A.

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Detailed Solution

Using BODMAS, the order to be followed is Bracket, Order, Division, Multiplication, Addition, Subtraction.

6(21 ÷ 3) - (4 x 5)
= 6(7) - (4 x 5) ...[Left bracket operation, ...(21 ÷ 3) = 7]
= 6(7) - 20 ...[Right bracket operation, ...(4 x 5) = 20]
= 42 - 20
= 22

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