解方程:14.5 2/3(x-7)=3/2 0.4(x 3)
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(x+3)/(x+2)+(x+9)/(x+8)=(x+5)/(x+4)+(x+7)/(x+6)1+(x+5)/(x+2)(x+8)=1+(x+5)/(x+4)(x+6)x=-5再问:第二步那个1是怎么
将x-7/x-9分解成1+2/(x-9)其他分式同理则原方程等价于1/x-9+1/x-5=1/x-6+1/x-81/x-6-1/x-5=1/x-9-1/x-81/(x-5)(x-6)=1/(x-8)(
解x>23/20
1.4x=132,x=132/4,x=33.2.1.36x=136,x=136/1.36,x=100.3.8.1+2x=15.3,2x=15.3-8.1,2x=7.2,x=3.6.直接抄就对了!再问:
((X-2)(X-4)-(X-3)^2)/(X-3)(X-4)=((X-5)(X-7)-(X-6)^2)/(X-6)(X-7),-1/(X^2-7X+12)=-1/(X^2-13X+42),6X=30
(5-x):3=75-x=3x75-x=21x=-16
7x-2x+3x=365x+3x=368x=36x=4.5
以上二式不是方程方程的解不是方程恒等式不是方程所谓方程是指含有未知量的代数式,你随便化简一下就可知啦
通分得[(x-8)(x-4)-(x-9)(x-3)]/(x-3)(x-4)=[(x+7)(x+3)-(x+2)(x+8)]/(x+8)(x+3)解得5/(x-3)(x-4)=5/(x+8)(x+3),
X+3X+5X+7X+9X+...99X=250(x+99x)*50/2=2502500x=250x=1/10
(x+8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)[(x-8)(x-4)-(x-9)(x-3)]/(x-3)(x-4)=[(x+7)(x+3)-(x+2)(
(7-2+3)X=368X=36X=9/2
7x=3*8.19x=3.51
2(x-3)(x+5)=x^2+(x+2)(x-2)+(x+7)2(x^2+2x-15)=x^2+x^2-4+x+72x^2+4x-30=2x^2+x+33x=33x=11
X=4/5+7/34再答:X=4/5+7/3再答:对吧再答:X=47/15
去分母得:3x-6-2x=0,解得:x=6,经检验x=6是分式方程的解.
两边乘1015x-35-36x>-12
原方程可化为:7x(x+1)+3x(x−1)=1+7−x2(x+1)(x−1)方程两边乘x(x+1)(x-1)得,7(x-1)+3(x+1)=x(x+1)(x-1)+x(7-x2)化简得,4x=4∴x
x²-10x-24=0(x-12)(x+2)=0x=12或x=-2