# How to rearrange this equation?

1. Jul 9, 2013

### medougie

How to rearrange this equation?
apparently 1/M (F-μmg)=μmg/g
goes to
μ=F/(M+m)g
i never learnt the simple maths and im paying for it now

2. Jul 9, 2013

### Staff: Mentor

The first equation looks wrong - assuming this comes from physics, it has inconsistent units.
My guess: 1/M (F-μmg)=μmg/m
In that case, you can simplify the m/m on the right side, and multiply both sides with M afterwards.

I guess the second equation should be μ=F/((M+m)g)? Better: $\displaystyle \mu = \frac{F}{(M+m)g}$

3. Jul 9, 2013

### medougie

yes your right i wrote that wrong it should have been 1/M (F-μmg)=μmg/m.
what do i do once i multiply both sides by M?
I have μ on both sides and im solving for μ

4. Jul 9, 2013

### Staff: Mentor

Bring both parts with μ on the same side, factor it out, and you are just one step away from the solution.