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解方程:x%1/5x=2/3

x-1/5x=2/34/5x=2/3x=5/6

5x^2-5x=6 5x^2-5x-6=0 x^2-x-6/5=0 ( x-1/2)^2=6/5+1/4=29/20 那么得出x等于1/2加减根号下29/20

x-2/3=1/5 x=1/5+2/3x=13/15x+1/3=1/2+1/6 x+1/3=2/3x=2/3-1/3x=1/3x-5/12=3/8 x=3/8+5/12x=19/244/7-x=1/3 x=4/7-1/3x=5/2114.5-3.1x=11.43.1x=14.5-11.43.1x=3.1x=3.1÷3.1x=1

1-5x=2x+3 移项 2x+5x=1-3 合并同类项 7x=-2 两边同除以7 x=-2/7 2) 1-5x=2x+3 两边都减去2x 1-5x-2x=2x-2x+3 1-7x=3 两边都减去1 1-7x-1=3-1 -7x=2 两边都除以-7 x=-2/7第二种方法已经写的很详细了请认真看完

5x - 3= 2 - x 5x + x = 2 +3 6x = 5 x = 5/6

(5x-1)^2=3(5x-1) 移项提取公因式得(5x-1)(5x-1-3)=0 (5x-1)(5x-4)=0 x=1/5或x=4/5

第一题3(x-1)=5x+2 3x-3=5x+2 -5=2x x=-5/2 二4-3x=1+5(x-3) 4-3x=1+5x-15 -8x=-18 x=9/4 三3(2x+5)-2(x-2)=7 6x+15-2x+4=7 4x=-12 x=-3 四2(x-1)-3(x+2)=x 2x-2-3x-6=x -2x=8 x=-4

(x—1)/(x+2)=3/5 两边同时乘以5(x+2) 去分母得: 5(x-1)=3(x+2) 5x-5=3x+6 5x-3x=6+5 2x=11 x=5.5

1/5x-3/100x=3420x-3x=340017x=3400x=20 x-5/3*2/5=5/6x-2/3=5/6x-4/6=5/6x=9/6=3/2

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