# Differential equation problem

## Homework Statement

Find the value of k for which the constant function x(t)=k is a solution of the differential equation 9t$$_{2}$$$$\frac{dx}{dt}$$ -3x + 7 = 0.

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## The Attempt at a Solution

I'm a little confused on where to start...I was under the impression I had to factor and find what values would set the function equal to zero, so I did that, but it didn't come out right. Help?