Question

Make r the subject of the formula t=r/r-3

Answer 1

r = 3t/(t - 1)

Explanation:

t = r/(r - 3)

t(r - 3) = r

tr - 3t = r

tr = r + 3t

tr - r = 3t

r(t - 1) = 3t

r = 3t/(t - 1)

Answer 2

`r = (3t)/(t-1)`

Explanation:

`t = (r)/(r - 3)`

Cross multiply,

t(r - 3) = r

tr - 3t = r

tr = r + 3t

tr - r = 3t

r(t -1) = 3t

`r = (3t)/(t-1)`