Question

S=L (1 - r), for r

This is all it says, you are solving for r, the instructions just say solve for r

Answer 1

Solving for r is the same as isolating it. Since we have (1-r) being multiplied by L, we want to divide it out so we can work with (1-r), so:

`(S)/(L)=1-r`

Now, we want to make -r positive, so we multiply both sides by negative 1:

`-(S)/(L)=r-1`

Now, to isolate r we want to add 1 to both sides, so:

`1-(S)/(L)=r`

and we're done.