найдите корни уравнений 1)3.2/20-x=18.1/8. 2)-10.3/7-x=-9.2/3. 3)3.1/2-x=7.1/5. 4)40.5/9-x=63.4/5

1)x = 3.1/10-18.1/8x= 3.4/40-18.5/40x= -15.1/402)-x =10.3/7-9.2/3-x=10.9/21-9.14/21x=-16/213)-x=7.1/5-3.1/2-x =7.2/10-3.5/10x=-3.7/104)-x = 63.36/45-40.25/45x=-23.11/45