Question

解方程1,2,3,4题,过程完整一点,

Answer 1

12分之5X - 4分之X = 3分之1

两边同时乘以 12 得 :

5x - 3x = 4

2x = 4

x = 4÷2

x = 2

2/3-8x=3-x/2

4-48x=18-3x

-48x+3x=18-4

-45x=14

x=-14/45

0.5x-0.7=6.5-1.3x

0.5x+1.3x=6.5+0.7

1.8x=7.2

x=7.2÷1.8

x=4