将方程X除以0.3减去2X减去1除以0.7=5
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/16 06:49:30
![将方程X除以0.3减去2X减去1除以0.7=5](/uploads/image/f/3957154-34-4.jpg?t=%E5%B0%86%E6%96%B9%E7%A8%8BX%E9%99%A4%E4%BB%A50.3%E5%87%8F%E5%8E%BB2X%E5%87%8F%E5%8E%BB1%E9%99%A4%E4%BB%A50.7%3D5)
x/(y-x)
x/0.7-(1.7-2x)/0.3=x/7/10-[(17/10-2x)/3/10]=10x/7-{[(17-20x)/10]/3/10}=10x/7-[(17-20x)/3]=(30x-119+1
假设y=x+2则原式化为:y^2-2y-3=0所以,(y-3)(y+1)=0所以,y=3或y=-1所以,x+2=3或x+2=-1所以,x=1或x=-3
4X减去2X等于102x=10x=5
把x移到一边3分之2减3等于8x减2分之1x-7/3=15x/2x=-14/45
x²-6x-1=0x²-6x=1x²-6x+9=1+9=10(x-3)²=(±√10)²x-3=±√10x1=3+√10,x2=3-√10|√27-6
图再问:对么再答:对再问:◥◤~~~~◥◤ ┃ ┃≡━﹏━≡ ┗━━┳∞┳━━┛ ┏┫ ┣┓再答:谢谢采纳再答:Thankyou
解方程:2+96/(x^2-16)=(2X-1)/(x-4)-(3x-1)/(4-x)2+96/(x^2-16)=(2X-1)/(x-4)+(3x-1)/(x-4)2+96/(x^2-16)=(5x-
x+1分之x+2减去x+3分之x+4=x+5分之x+6减去X+7分之x+8方程两边分别通分,得[(x+2)(x+3)-(x+1)(x+4)]/[(x+1)(x+3)]=[(x+6)(x+7)-(x+8
x/(x-1)-2x-2/x=x²/x(x-1)-2x²(x-1)/x(x-1)-2(x-1)/x(x-1)=(-2x³+3x²-2x+2)/x(x-1)
x分之2减去x+1分之x=1两边同乘以x(x+1),得2(x+1)-x²=x(x+1)2x²-x-2=0
90/X-90/3X=3270/3X-90/3X=3160/3X=3180=9XX=20再问:请再帮帮忙吧:解方程2.4∕5X-2.4∕6X﹦1.6再答:2.4∕5X-2.4∕6X﹦1.614.4/X
(35-x)/0.5=1635-x=16×0.5=8x=35-8x=27
4x/(2x-1)-(x+1)/(x-2)=1先通分[4x(x-2)-(x+1)(2x-1)]/[(2x-1)(x-2)]=14x2-8x-(2x2+x-1)=2x2-5x+2x=-1/4其中x2代表
x^2-2x=0x(x-2)=0x=0或x=2
是不是X除以3减去4等于x除以4减去1X*1/3-4=X*1/4-1X/3-4=X/4-1X/3-X/4=34X-3X=36X=36
直接移就行0.7分之x-1.4x=1+0.3分之1.70.7分之0.4x=0.3分之20.7乘以2=0.4x乘以0.30.12x=0.146x=7
4(6-x/5)=102(6-x/5)=512-2x/5=52x/5=7x=14/74*6-x/5=1024-x/5=10x/5=14x=72
x^2+1/x^2-1减去x-2/x-1除以x-2/x=(x²+1)/(x²-1)-(x-2)/(x-1)÷(x-2)/x=(x²+1)/(x²-1)-x/(x