9.5х-(3.2х+1.8х)+3.75=6.9 помогите

9.5х-(3.2х+1.8х)+3.75=6.99.5х-3.2х-1.8х+3.75=6.94.5х+3.75=6.94.5х=6.9-3.754.5х=3.15х=3.15:4.5х=0.7

9,5x-3,2x-1,8x+3,75-6,9=04,5x-3,15=04,5x=3,15X=0,7