-1 3/7(1,4-0,7y)+ 0,6(1 2/3-5y)

-1 3/7*1.4=-10/7*7/5=-2-1 3/7*(-0.7y)=-10/7*(-7/10y)=y0.6*1 2/3=3/5*5/3=10.6*(-5y)=-3y=-2+y+1-3y=-1-2y