S=l (1 - r), for rthis is all it says, you are solving for r, the instructions just say solve for r

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:

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

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

and we're done.

won't that be plagrisim thought?

step-by-step explanation: