The correct answer is:
A. P=71 and Q=73
Step-by-step explanation:
To have infinitely many solutions, one line would need to lay over the other. The only values of P and Q that will make this true will make the equations identical; this means Q must be the same as the coefficient of x on the left side, or 73; and P must be the same as the constant on the right side, or 71.