instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: if a - b = 6 and a 2 + b 2 = 50 , find the value of ab .
answer:
a ) 7


question:
Problem: a certain fraction is equivalent to 3 / 5 . if the numerator of the fraction is increased by 4 and the denominator is doubled , the new fraction is equivalent to 1 / 3 . what is the sum of the numerator and denominator of the original fraction ?
answer:
56


question:
Problem: one fourth of a solution that was 8 % sugar by weight was replaced by a second solution resulting in a solution that was 16 percent sugar by weight . the second solution was what percent sugar by weight ?
answer:

40 %