Logarithmic Regression Model Prediction

The relationship between two variables, x and y, can be modeled by the equation $y = a + b\log_{10}(x)$. After transforming the data to $(\log_{10}(x), y)$, a least-squares regression yields the line $y = 2 + 3\log_{10}(x)$. According to this model, what is the predicted value of $y$ when $x = 10$?