Question

I want to rearrange the formula of 3+x=ax to find out what x is equal to. I already know the answer via the answer sheet but I want to know how to get that answer.

Answer 1

Answer:

See below.

Step-by-step explanation:

$3+x=ax$    (Given)

$x=ax-3$    (Subtracted 3 on both sides)

$x-ax=-3$    (Subtracted ax on both sides)

$x(1-a)=-3$    (Factor out x from x - ax)

$x=-\frac{3}{1-a}$    (Divided 1 - a on both sides)