4(-y-0,5)-2,5=-5(0,2+1,5y)
4(-y-0.5)-2.5=-5(0.2+1.5y) -4y-2-2.5=-1-7.5y -4y-4.5=-1-7.5y -4y+7.5y=-1+4.5 3.5y=3.5 y=3.5:3.5 y=1