作业帮x-36=1·4解方程
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(x+1)(x+3)+4x=-13x方+4x+3+4x+13=0x方+8x+16=0(x+4)方=0x1=x2=-4
36+2X=4(12-X)36+2X=48-4X2X+4X=48-366X=12X=2
x+7分之1x=56两边同乘以7,得7x+x=56×78x=56×7x=7×7x=49x-4分之x=364分之3x=364分之x=12x=48
x(2x-4)+3x(x-1)=5x(x-3)+82x²-4x+3x²-3x=5x²-15x+88x=8x=1
(x²-x+4)x-(x-1)(x²+2)=x+7x³-x²+4x-x³+x²-2x+2=x+72x+2=x+72x-x=7-2x=5
(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=(x/2)*(2/x(x+2))+(2/(x+2)(x+4))+.+2/(x+8)(x+10)=(x/2)*[1/x
1.7x-4x=363x=36x=122.0.2x+5X0.6=4.80.2x=4.8-30.2x=1.8x=9给分吧!
X-X+1/4X=561/4X=56X=56÷1/4X=224
4(123-x)=57+x492-4x=57+xx+4x=492-575x=435x=87
(x+1)/（x-1）+4/（x²-1）=1（x²+2x+1+4）/（x²-1）=1x²+2x+5=x²-12x=-6x=-3
x+5%1=36x+0.05=36x=36-0.05x=35.95
2.4x=36x=15再问：详细点过程再答：无语，总共就两步骤
2x+4x+6x...+100x=1-(x+3x+5x+...+99x)x(2+4+6+...+100)=1-x(1+3+5+...99)x(2+4+6+...+100)+x(1+3+5+...+99
2.4x=36x=15
x^4+5x^2-36=0(x^2+9)(x^2-4)=0(x^2+9)(x-2)(x+2)=0x1=2x2=-2
首先由题意得x+1≠0,x+7≠0,x+5≠0,x+3≠0,即x≠-1,x≠-7,x≠-5,x≠-3,则先简化方程(x+1+1)/(x+1)+(x+7+1)/(x+7)=(x+5+1)/(x+5)+(
x\36-x\45=4左右乘1805x-4x＝720x＝720
(1/2)x(x-1)=36x(x-1)=72x^2-x-72=0(x+8)(x-9)=0x+8=0x=-8x-9=0x=9x=-8或x=9
(36-4x)/8=136-4x=84x=28x=7检验：左边=（36-4*7）/8=1右边=1左边=右边所以x=7是方程的解.
1、x>=0时,[2x]