Let x be a positive integer such that
$$\frac { 10 x } { x + 3 }$$
is equal to the square of an integer. What is the sum of the values that x can take?
A) 26
B) 27
C) 29
D) 31
E) 32
Let x be a positive integer such that

$$\frac { 10 x } { x + 3 }$$

is equal to the square of an integer. What is the sum of the values that x can take?\\
A) 26\\
B) 27\\
C) 29\\
D) 31\\
E) 32