Answer:

Step-by-step explanation:

Now taking 3x to right hand side of the eqn . & +1 to the left side eqn. , sign of 3x changes to -3x & +1 changes to -1 .

Now solving this , we get the value of x.

I believe it is just 2/3. Sorry if I am wrong!
Well, the short answer is, we divide that 3.6 by (7+2+9) and then we give as many pieces at the ratio to each, so let's do so,