2x+1=2-x 咋算 2（x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/62x+1=2-x 2（x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/6

2x+1=2-x 咋算 2（x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/62x+1=2-x 2（x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/6
2x+1=2-x 咋算 2（x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/6
2x+1=2-x
2（x+8)=3(x-1)
x-3/2-4x+1/5=1
3y-1/4-1=5y-7/6

2x+1=2-x 咋算 2（x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/62x+1=2-x 2（x+8)=3(x-1) x-3/2-4x+1/5=1 3y-1/4-1=5y-7/6
1.2x+1=2-x
2x+x=2-1
3x=1
x=1/3
2.2（x+8)=3(x-1)
2x+16=3x-3
2x-3x=-3-16
x=19
3.x-3/2-4x+1/5=1
5(x-3)-2(4x+1)=10
5x-15-8x-2=10
-3x=27
x=-9
4.3y-1/4-1=5y-7/6
两边同乘以12 得
3（3y-1）-12=2(5y-7)
9y-3-12=10y-14
9y-10y=-14+3+12
y=-1

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

2x+1=2-x
2x+x=2-1
3x=1
x=1/3
2（x+8)=3(x-1)
2x+16=3x-3
2x-3x=-3-16
-x=-19
x=19
x-3/2-4x+1/5=1
x-4x=1-1/5+3/2
-3x=4/5+3/2
-3x=8/10+15/10
-3x=23/10
x=-23/30
3y-1/4-1=5y-7/6
3y-5y=-7/6+1+1/4
-2y=-1/6+1/4
-2y=-2/12+3/12
-2y=1/12
y=-1/24

解:2x+1=2-x 2x+x=2-1 3x=1 x=1/3
2（x+8)=3(x-1) 2x+16=3x-3 2x-3x=-3-16 -x=-19 x=19
x-3/2-4x+1/5=1 x-4x=1-1/5+3/2 -3x=4/5+3/2 -3x=8/10+15/10 -3x=23/10 x=-23/30
3y-1/4-1=5y-7/6 3y-5y=-7/6+1+1/4...

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解:2x+1=2-x 2x+x=2-1 3x=1 x=1/3
2（x+8)=3(x-1) 2x+16=3x-3 2x-3x=-3-16 -x=-19 x=19
x-3/2-4x+1/5=1 x-4x=1-1/5+3/2 -3x=4/5+3/2 -3x=8/10+15/10 -3x=23/10 x=-23/30
3y-1/4-1=5y-7/6 3y-5y=-7/6+1+1/4 -2y=-1/6+1/4 -2y=-2/12+3/12 -2y=1/12 y=-1/24
如有特定要求,还要写:
2x+1=2-x 2x+x=2-1 3x=1 x=1/3
移项:2x+x=2-1
合并同类项:3x=1
系数化为1:x=1/3

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