Does anyone know the answer to this

3(4x-3)-7x=5x-9   simplify

12x - 9 - 7x  = 5x - 9

5x - 9   = 5x - 9

Both sides are exactly the same........this means that we have infinite solutions  !!!!

C . No solution 

C . No solution 

How many solutions does the equation have? 3(4x-3)-7x=5x-9

A. one solution

B. infinite solutions

C. no solution

The answer is B. infinite solutions, because the left side will always equal the right side, whatever the value of x.