(x - 1) / 0.3 - (x + 1) / 0.5 = 1.2
(x - 1) / (3/10) - (x + 1) / (5/10) = 1.2
(x - 1) X 10 / 3 - (x + 1) X 10 / 5 = 1.2
10 (x - 1) / 3 - (x + 1) X 2 = 1.2
3 X (10x - 10) / 3 - (2x + 2) X 3 = 1.2 X 3
10x - 10 - 6x - 6 = 3.6
4x - 16 = 0.9 X 4
x - 4 = 0.9
x = 4.9
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