can u show how to work this on a calculator. either finance or ti 84 plus?

1. Karen's portfolio, which has a beta of 2, consists of three mutual funds: an international fund, a utility fund and a technology fund. The international fund has a beta of 2 and make up 20% of the portfolio. The Utility fund has a beta of 1 and the technology has a beta of 3. How much of Karen's portfolio is invested in the technology fund? a. 40% b. 30% c. 20% d. 10% 0.2* 2 + (0.8-X)*1 + (X)*3= 2 0.4 +0.8 -X + 3X = 2 2X=2-1.2=0.8 X=0.4 = 40% is invested in technology fund