According to the rules of equality, you can add or subtract the same number(s) from both sides of the equal sign. Here, it is convenient to subtract the number of tiles that is on the side with the least number of tiles. That means we want to subtract 2 x-tiles from both sides.
The cow produces 5 liters a day. You want to find how much it will produce a day if the cow produces 200% more milk. So, you use the equation p*(1+x/100) <span>5×(1+200/100)=15</span>
