Question

解方程,有分追加

2/3-8x＝3+1/2x

(x+1)-2(x-1)＝1-3x

(4-x)/3＝(x-3)/5-1

2.4-(y-4)/0.5＝3/5y

Answer 1

2/3-8x＝3+1/2x
两边同乘6,得
4-48x=18+3x
4-18=3x+48x
-14=51x
x=-14/51

(x+1)-2(x-1)＝1-3x
x+1-2x+2=1-3x
x-2x+3x=1-1-2
2x=-2
x=-1

(4-x)/3＝(x-3)/5-1
两边同乘15,得
5(4-x)=x-3-15
20-5x=x-18
20+18=x+5x
6x=38
x=19/3

2.4-(y-4)/0.5＝3/5y
两边同乘5,得
12-10(y-4)=3y
12-10y+40=3y
52=13y
y=4

Answer 2

1.x=-14/51

2.x=-1

3.x=11/2

4.52/13

Answer 3

1.
2/3-8x＝3+1/2x
-17/2x=7/3
x=-14/51

2.(x+1)-2(x-1)＝1-3x
x+1-2x+2=1-3x
2x=-2
x=-1

3.
(4-x)/3＝(x-3)/5-1
5(4-x)=3(x-3)-15
20-5x=3x-24
-8x=-4
x=1/2

4.
2.4-(y-4)/0.5＝3/5y
12-10(y-4)=3y
12-10y+40=3y
-13y=-52
y=4