We are given system of equations : (4x + 10y = 12) (10x + 25y = 30).
On solving system of equations, we are getting 0=0.
Please see, we are getting left side equal to right side.
<em>When we get left side equal to right side on solving system of equations it would show that, it would true for all x values for both equation.</em>
Means the system of equation would have infinitely many solution.
Therefore, correct option is :
There are infinitely many solutions to the system.