EM-1660

Changing the subject of a formula

E Math · Secondary 4 · Hard · Changing the subject of a formula

It is given that

\dfrac{3p}{q-1} = \dfrac{2}{q}

.

(a) Express

p

in terms of

q

.

(b) Hence find

p

when

q = 5

.

$p = \dfrac{2q-2}{3q},\; p = \dfrac{8}{15}$
$p = \dfrac{2q}{3(q-1)},\; p = \dfrac{10}{12}$
$p = \dfrac{2q+2}{3q},\; p = \dfrac{12}{15}$
$p = \dfrac{2q-2}{3(q-1)},\; p = \dfrac{8}{12}$

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