Упростить выражение 5/6×(2,4х+6/35у)-1,2×(/3х-5/7у)

5/6 * 2,4х + 5/6 * 6/35у - (1,2 * 2/3х - 1,2 * 5/7у) = = 2х + 1/7у - (4/5х - 6/7у) = 2х + 1/7у - 4/5х + 6/7у = =  1 1/5х + у = 1,2х + у

[latex]\frac{5}{6}(2,4x+\frac{6}{35}y)-1,2(\frac{2}{3}x-\frac{5}{7}y)[/latex] = [latex]\frac{5}{6}*2,4x+\frac{6}{35}y*\frac{5}{6}-1,2(\frac{2}{3}x-\frac{5}{7}y)[/latex] = [latex]5*0,4x+\frac{5}{35}y-1,2(\frac{2}{3}x-\frac{5}{7}y)[/latex] = [latex]2x+\frac{1}{7}y-1,2(\frac{2}{3}x-\frac{5}{7}y)[/latex] = [latex]2x+\frac{1}{7}y-1,2*\frac{2}{3}x-\frac{5}{7}y*(-1,2)[/latex] = [latex]2x+\frac{1}{7}y-0,4*2x+\frac{5}{7}y*1,2[/latex] = [latex]2x+\frac{1}{7}y-0,8x+\frac{6}{7}y[/latex] = [latex]2x-0,8x+\frac{1}{7}y+\frac{6}{7}y[/latex] = [latex]1,2x+\frac{7}{7}y[/latex] = [latex]1,2x+1y[/latex] = [latex]1,2x+y.[/latex]