How much water must be evaporated from 130 gallons of a 9% acid solution to make a 12% acid solution?

33 gallons

Step-by-step explanation:

We initially have 130 gallons of a acid solution and we need to change it to a acid solution, and for that it is necessary to evaporate gallons of water.

So, this situation can be mathemtically expressed as follows:

Then:

Isolating :

Hence, we need to evaporate 33 gallons of water.

no this is a nonlinear negative