Question

Given 2/p+ 1/q = 3/r. Express q as the subject of the formula

Answer 1

Answer:

2/p+ 1/q = 3/r

1/q = (3/r) - (2/p)

1/q = (3p-2r)/rp

rp/ (3p-2r) = q

q = rp/(3p-2r)