Question

解4道方程（要步骤,十二分之5x－四分之x＝三分之1 三分之2－8x＝3－二分之1x 0.5x－0.7=6.5－1.3x

Answer 1

5/12x-x/4=1/3

5/12x-3/12x=1/3

1/6x=1/3

x=1/3*6

x=2

2/3-8x=3-1/2x

-8x+1/2x=3-2/3

-15/2x=7/9

x=7/9*(-2/15)

x=14/135

0.5x-0.7=6.5-1.3x

0.5x+1.3x=6.5+0.7

1.8x=7.2

x=4

1/6（3x-6）=2/5x-3

1/2x-1=2/5x-3

1/2x-2/5x=-3+1

5/10x-4/10x=-2

1/10x=-2

x=-2*10

x=-20