TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: solution y is 30 percent liquid x and 70 percent water . if 2 kilograms of water evaporate from 6 kilograms of solution y and 2 kilograms of solution y are added to the remaining 4 kilograms of liquid , what percent of this new solution is liquid x ?

SOLUTION: 40 %

PROBLEM: Problem: the area of a triangle is with base 12 m and height 5 m ?

SOLUTION: 30 m 2

PROBLEM: Problem: if 7 cats can kill 7 rats in 7 minutes , how long will it take 100 cats to kill 100 rats ?

SOLUTION:
7 minutes