Question

解方程：⑴4/3-8X=3-11/2X⑵0.5X-0.7=6.5-1.3X⑶1/6(3X-6)=2/5X-3⑷(1-2X

Answer 1

1//解是x=-2/3.

/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

1/6(3x-6)=2/5x-3

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

1/10x=-2

x=-20

1-2x/3=3x+1/7-3

等式两边同时乘以21,得

7(1-2x)=3(3x+1)-3*21

7-14x=9x+3-63

23x=67

x=67/23

3/