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(5p - 3q) - (5p + 3q)
= 5p - 5p - 3q - 3q
= - 6q (B)

(10x / 16) + (3x /4)
= 10x + 4(3x)
------------------
16
= 10x + 12x
-----------------
16
= 22x
-----------
16
(B)

(5p - 3q) - (5p + 3q)
= 5p - 3q - 5p - 3q
= -6q

10x/16 + 3x/4
= 10x/16 + 12x/4
= 22x/16
= 11x/8