Question

解方程：①3分之2x+5分之3x=12 ②9分之5+2x=3分之2 ③4x+2分之1x=9 ④5x+2分之9=6 ⑤2x

Answer 1

①3分之2x+5分之3x=12

(2/3+3/5)x=12

19/15x=12

x=12*15/19

x=180/19(19分之180)

②9分之5+2x=3分之2

2x=2/3-5/9

2x=1/9

x=1/9÷2

x=1/18

③4x+2分之1x=9

(4+1/2)x=9

9/2x=9

x=9*2/9

x=2

④5x+2分之9=6

5x=6-9/2

6x=3/2

x=3/2÷6

x=1/4

⑤2x+5分之4=2

2x=2-4/5

2x=6/5

x=6/5÷2

x=3/5