1) 2x + 9.8 = 13.6
2x = 13.6 - 9.8
2x = 3.8
x = 3.8 / 2
x = 1.9

2) 10.36 - 3x = 5.86
-3x = 5.86 - 10.36
-3x = -4.5
x = -4.5 / -3
x = 1.5

3) 4.2x - 6 = 366
4.2x = 366 + 6
4.2x = 372
x = 372 / 4.2
x = 88.57

4) 19.5 - 0.3x = 15.9
-0.3x = 15.9 - 19.5
-0.3x = -3.6
x = -3.6 / -0.3
x = 12

5) (7 - 0.2) 1.4
(6.8) 1.4
9.52

6) (6.1x - 13.2) / 1.7 = 3
6.1x - 13.2 = 1.7 * 3
6.1x - 13.2 = 5.1
6.1x = 18.3
x = 18.3 / 6.1
x = 3.