I am having a hard time understanding how I am supposed to put this formula into my calculator. How do I put that I am solving for Beta into my calculator?

What is the beta of a portfolio with an expected return of 18% assuming the risk-free rate is 6% and the market return is 14%. [start with CAPM: E(r) - r(f) = B[r(m) - r(f)]

18 - 6 = B (14 -6) B = 1.5