MA-758

Finding an unknown in a formula

Lower Sec Maths · Secondary 2 · Hard · Finding an unknown in a formula

It is given that

p = \dfrac{2m}{3} - \dfrac{5n}{4}

.

(a) Find

p

when

m = 6

and

n = -2

.

(b) Express

m

in terms of

p

and

n

.

$m = \dfrac{3}{2}\Bigl(p + \dfrac{5n}{4}\Bigr)$
$m = \dfrac{2}{3}\Bigl(p + \dfrac{5n}{4}\Bigr)$
$m = \dfrac{3}{2}\Bigl(p - \dfrac{5n}{4}\Bigr)$
$m = \dfrac{2}{3}p - \dfrac{5n}{4}$

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