(1)4(2x-1)-3(5x+2)=3(2-x)(2)2x-3/5x=3/2x-1/2-2/5x+2(3)y-(y-1)/2=2_数学解答

(1)4(2x-1)-3(5x+2)=3(2-x)
(2)2x-3/5x=3/2x-1/2-2/5x+2
(3)y-(y-1)/2=2-(y+3)/5
(4)(x-2)/5-(x+3)/10=(2x-5)/3=3
(5)[2(x+1)+1]/3-[2-3(x+1)]/4=x
(6)30%(2x-1)+20%(x+5)=250×25%
请写出计算过程（至少3步）,求100%全对,

人气：216 ℃　时间：2020-02-04 05:23:35

解答

(1)8x-4-15x-6=6-3x
-4x=16
x=-4
(2)1.4x=1.5x-0.5-0.4x+2
0.3x=1.5
x=5
(3)y-0.5y+0.5=2-0.2y-0.6
0.7y=0.9
y=9/7
(4)有问题
(5)4[2(x+1)+1]-3[2-3(x+1)]=12x
8x+8+4-6+9x+9=12x
5x=-15
x=-3
(6)3(2x-1)+2(x+5)=25×25
6x-3+2x+10=625
8x=618
x=77.25