# simplifying an equation

#### kokkie_d

Joined Jan 12, 2009
72
Hi,

suppose I have the following equation:
$$\frac{a*b+a*R}{b+R}$$

I threw this in maple and on wolfram alpha and Matlab just to see what they do with it to simplify and all came back with: a

Would someone be able to explain how to go about achieving this?

#### kokkie_d

Joined Jan 12, 2009
72
Just saw the solution;

$$\frac{a*b+a*R}{b+R} = \frac{a(b+R)}{b+R}=a$$

red faced person typing this. lol

#### WBahn

Joined Mar 31, 2012
26,280
Don't fret. We all occasionally sit staring at something for a long time only to see (or have pointed out to us) the most simple, obvious solution. It seems like you often spot the solution yourself only after asking someone else -- and I suspect that is not coincidence. The act of explaining the problem to someone else forces you to view the problem somewhat anew.

• kokkie_d

#### kokkie_d

Joined Jan 12, 2009
72
So true.

Where is the like button. lol

#### WBahn

Joined Mar 31, 2012
26,280
So true.

Where is the like button. lol
To the far right bottom of the post. • kokkie_d

#### MrChips

Joined Oct 2, 2009
22,076
There is one condition.

The result is a if and only if (b + R) ≠ 0.

• kokkie_d