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