A: [tex]2a - 0,2= 11\\2a = 11- 0,2\\2a = 10,8/ :2 \\a = 5,4[/tex]
B: [tex]\frac{3}{5} + 6x = 7,6\\\frac{6}{10} + 6x = 7,6 \\0,6 +6x = 7, 6 \\6x = 7,6 - 0,6 \\6x = 7 /:6\\x = \frac{7}{6} \\x = 1 \frac{1}{6}[/tex]
C: [tex]3m - 4 = 18 \\3m = 18+4 \\3m = 22 /:3\\m= \frac{22}{3} \\m = 7 \frac{1}{3}[/tex]
D: [tex]0,1x + 4 = 9 \\0,1x = 9-4 \\0,1x = 5/ *10\\x = 50[/tex]