几道解方程题(初中难度):1.12x-8=x+16+3x 2.2x-2+5=-2x+1 3.8x-1/3x=x-1

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几道解方程题(初中难度):1.12x-8=x+16+3x 2.2x-2+5=-2x+1 3.8x-1/3x=x-1
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几道解方程题(初中难度):1.12x-8=x+16+3x 2.2x-2+5=-2x+1 3.8x-1/3x=x-1
几道解方程题(初中难度):
1.12x-8=x+16+3x 2.2x-2+5=-2x+1 3.8x-1/3x=x-1

几道解方程题(初中难度):1.12x-8=x+16+3x 2.2x-2+5=-2x+1 3.8x-1/3x=x-1
①解 12x-x-3x=8+16
8x=24
x=3
②解 2x+2x=2+1-5
4x=-2
x=-1/2
③解 8x-x/3-x=-1
24x-x-3x=-3
20x=-3
x=-3/20


1. 12x-8=x+16+3x
12x-8=4x+16
4(3x-2)=4(x+4)
3x-2=x+4
3x-x=4+2
2x=6
...

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1. 12x-8=x+16+3x
12x-8=4x+16
4(3x-2)=4(x+4)
3x-2=x+4
3x-x=4+2
2x=6
x=3 .

2. 2x-2+5=-2x+1
2x+3=-2x+1
2x+2x=1-3
4x=-2
x=-1/2 .

3. 8x-1/3x=x-1
8x-1/3x-x=-1
7x-1/3x=-1
20/3x=-1
x=-3/20 .

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