The denominator of a fraction exceeds its numerator by 1. Two thirds of the fraction exceeds one third of the fraction by 16. The original fraction is
23xx+1=1x3(x+1)+16
x3(x+1)=16
2x = x +1
x =1
When 6 is added to the numerator of a fraction, the numerator becomes twice the denominator. In another fraction, 10 times the denominator exceeds 5 times the numerator by 30. The number of solutions for the given equations is