7/9x-5/18x+1/4x=1/6 помогите пожалуйста

7/9x-5/18x+1/4x=1/6                                7/9-5/18+1/4=(28-10+9)/36=27/36=3/43/4x=1/6x=1/6:3/4                                                1/6:3/4=1/6*4/3=2/9x=2/9