20x-4(2x+3)=5(x-1)
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20x-4(2x+3)=5(x-1)20x-4(2x+3)=5(x-1)20x-4(2x+3)=5(x-1)20X-8X-12=5X-520X-8X-5X=12-57X=7X=120x-8x-12=5
20x-4(2x+3)=5(x-1)
20x-4(2x+3)=5(x-1)
20x-4(2x+3)=5(x-1)
20X-8X-12 =5X-5
20X-8X-5X =12-5
7X=7
X=1
20x-8x-12=5x-5
12x-12=5x-5
12x-5x=12-5
7x=7
x=1
麻烦解4道分式方程(20分)(x/2x-5)+(5/5-2x)=1(x+1/x*x-2x)-(1/x)=3/x-2(1-x/5-x)-(5-x/1-x)=8/x*x-6x+5(x+1/x-1)-(4/x*x-1)=1去掉括号,不管前面正负,都不变号~
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