a) The solutions are the values of x that satisfies the inequality x > 9
Since every number greater than 9 satisfies the inequality and these numbers are infinite.
Hence the number of solutions for x > 9 is infinite
b) x + 1/2 = 5/6
x = 5/6 - 1/2 =( 5-3)/6 =2 / 6 = 1 / 3
Hence the number of solutions for x + 1/2 = 5/6 is 1