Solve for 'D' Give the answer
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Take 2nd and 3rd equation
= B × C = 84
= C ÷ 4 = 3
Divide both of these equations
= BC/C/4 = 84/3
= 4BC/C = 28
= 4B = 28
= B = 7
Put this B value in the last equation
= B + D = 18
= 7 + D = 18
= D = 11
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