5x+3=x-4
4x=-7
x=-7/4
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4y+11=22,
4y=11
y=11/4
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11x+68-2x=100-9x,
9x+68=100-9x
18x=100-68
x=32/18=16/9
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0.1x/0.2-（0.27x+0.18）/0.04=1
x/2-(27x-18)/4=1
2x-27x+18=4
25x=14
x=14/25
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（x-1）/2=2-（x+2）/3
3(x-1)=2*6-2(x+2)
3x-3=12-2x-4
5x=11
x=11/5