How to find acceleration given only angle of slope and coefficient of friction?

[ExtendedG]

Homework Statement

A crate is placed on an inclined board. The coefficient of friction between the crate and the board is 0.26 , and the angle of the slope is 16 degrees. Calculate the acceleration of the crate down the incline.

Homework Equations

F=ma
Ff=umgcos(theta)
Forge of gravity parallel = mgsin(theta)

The Attempt at a Solution

F=ma
Fg - Ff = ma
mgsin(theta) - umgcos(theta) = ma
so this is where it gets tricky for me.. I've tried factoring and removing a mass from each side.. but I'm still left with one mass.
What do i do? :/

 

[rock.freak667]

From here:

mgsinθ - umgcosθ = ma

your mass 'm' cancels out, so the acceleration does not depend on the mass.

 

[ExtendedG]

sorry I'm still confused, but which mass comes out? or all the masses cancel out? when i try that, I don't get the answer.

 

[rock.freak667]

All of the 'm's in the equation are the same, so they all cancel out.

 

[ExtendedG]

All of the 'm's in the equation are the same, so they all cancel out.

Ah true okay thank you sir, help very much appreciated, so then I would just do:

gsinθ - ugcosθ = a

Now does the equation above work? because I think I remember trying this cancelling out all of the m's, and I got a wrong answer, but I probably did my math wrong. I'll check once I finish with my chemistry and math homework.