Hi I am having trouble getting this a/20+4/15=9/15

Question

anonymous · Answer

$$\frac{ a }{ 20 } + \frac{ 4 }{ 15 } = \frac{ 9 }{ 15 }$$

anonymous · Answer

Yep

anonymous · Answer

adding fractions needs a common denominator.

or, another better alternative is to multiply the entire equation, left and right side, by 20.  This will cancel the denominator under the "a" and help get you ready to solve for a.

anonymous · Answer

20(a/20) + 20(4/15) = 20(9/15)

Then simplify...

anonymous · Answer

Oh ok and then I'm done?

anonymous · Answer

yes, if you simplified, you hopefully got 
a + 80/15 = 180/15     and then...
a = 100/15, which reduces to...
a = 20/3

anonymous · Answer

wait, I think I made an error...

anonymous · Answer

Ohh ok thank you soo much!! :)

anonymous · Answer

no, it turns out a = 20/3 was correct :)  

Do you understand how to solve for the variable when there are fractions involved?

Hope this helped :)