解比例3/4x+x=5/12 4x-3*2.7=27.3

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解比例3/4x+x=5/12 4x-3*2.7=27.3
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解比例3/4x+x=5/12 4x-3*2.7=27.3
解比例3/4x+x=5/12 4x-3*2.7=27.3

解比例3/4x+x=5/12 4x-3*2.7=27.3
这个很简单3/4x+x=5/12
7/4x=5/12
x=5/21
4x-3*2.7=27.3
4x-8.1=27.3
4x=27.3+8.1
4x=35.4
x=8.85
一定对,

3/4x+x=5/12
(3/4+1)x=5/12
7/4x=5/12
x=-4/3
4x-3*2.7=27.3
4x-8.1=27.3
4x=27.3+8.1
4x=35.4
x=8.85

3/4x+x=5/12
7/4x=5/12
x=5/21
4x-3*2.7=27.3
4x-8.1=27.3
4x=27.3+8.1
4x=35.4
x=8.85