5x+3=x-4,4y+11=22,11x+68-2x=100-9x,0.1x/0.2-(0.27x+0.18)/0.0
1个回答

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