1200/x-2-1200/x=30
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/23 13:27:08
1200/x-2-1200/x=301200/x-2-1200/x=301200/x-2-1200/x=301200/x-2-1200/x=3040/x-2-40/x=1两边乘x（x-2）40x-40
1200/x-2-1200/x=30
1200/x-2-1200/x=30
1200/x-2-1200/x=30
1200/x-2-1200/x=30
40/x-2-40/x=1 两边乘x（x-2）
40x-40(x-2)=x*(x-2)
x²-2x=40x-40+80
x²-2x-80=0
(x-10)(x+8)=0
x1=10 x2=-8
(35-X)(30-2X)中X是多少(35-X)(30-2X)=1200
1200/x-2-1200/x=30
x^2-10x-1200=0如何变为（x-40)(x-30)
60(30x)=40x+20(30+x)+1200
(40-x)(20+2x)=1200 800+80X-20X-2x^2=1200 -2x^2+60X-400=0 x^2-30X+200=0 (X-10)(X-20)=0 X-10=0 X-20=0(X-10)(X-20)=0 40-x)(20+2x)=1200 800+80X-20X-2x^2=1200 -2x^2+60X-400=0 ^2-30X+200=0 (X-10)(X-20)=0
X-40%X+1200=2/3X怎么算
看下题!1500/x-(300/x+1200/2x)=4
(40-X)(20+2X)=1200
(20+2x)(40-x)=1200
（20+2x)(40-x)=1200
(40-x)(20+2x)=1200
(40-x)(20+2x)=1200
(20+2x)(40-x)=1200
(40-x)(20+2x)=1200
X^2+10x-1200=0
1200/x-2-1200/x=30要计算步骤
1200/x-1200/（x+2）=30
解方程：(1200/x-2)-(1200/x)=30