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Substituting and evaluating algebraic expressions questions and answers

what is the value of #frac{p(2r+q)}{q}#- r, where p=3,q-p=4 and r=#frac{p+q}{2}#
A.#8 5/7#
B. #6 4/7#
C.#2 2/7#
D. #2/7#

(4m 21s)

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