Question

0.3分之X减一减去0.5分之X加一等于1.2

Answer 1

(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