Which of the following is a radical equation? x+sqrt5=12 x2=16 3+xsqrt7=13 7sqrtx=14

Letter D) 7√x=14

It's 7√x = 14.

Step-by-step explanation:

That would be 7√x = 14.

In a radical equation the variable (x) is under a radical sign.

The equations x + √5 = 12 and 3 + x√7 = 13 contain radicals but they are radicals of a constant. The equation x^2 = 16 does not contain a radical.