(x减5)除以7=12.5
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![(x减5)除以7=12.5](/uploads/image/f/16091-35-1.jpg?t=%28x%E5%87%8F5%29%E9%99%A4%E4%BB%A57%3D12.5)
x/6-3=x/7+542(x/6-3)=42(x/7+5)7x-126=6x+2107x-6x=210+126x=336
(x+7)/(x+6)+(x+9)/(x+8)=(x+10)/(x+9)+(x+6)/(x+5)(x+9)/(x+8)-(x+10)/(x+9)=(x+6)/(x+5)-(x+7)/(x+6)[(x+
X除以(X-2)+(X-9)除以(X-7)=(X+1)除以(X-1)+(X-8)除以(X-6)(x-2+2/x-2)+(x-7-2/x-7)=(x-1+2/x-1)+(x-6-2/x-6)1+(2/x
5X+X/7=120(5+1/7)x=12036x/7=120x=70/3
1除以(x的平方+3x+2)+1除以(x平方+5x+6)+1除以(x平方+7x+12)=1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)=1/(x+1)-1/(x+2)+1
再问:240哪来的(≧^ω^≦)再答:全部扩大24O倍,去掉分母
6/x=x-56=x(x-5)x^2-5-6=0(x-6)(x+1)=0x1=6x2=-1再问:^是什么再答:^2是平方
(X-5)÷80%=X+70X-5=80%(X+70)X-5=0.8(X+70)X-5=0.8X+56X-0.8X=56+50.2X=61X=305
原式=4(x-3)/(x-5)(x+1)*(x+1)(x-1)/2(x-3)*(x-1)=2/(x-5)(x-1)*(x-1)=2/(x-5)=2/(7-5)=1
有什么问题的亲欢迎向我或者我的团队【定向求助】哦我们将在第一时间内尽力为您解答
x+5除以x+3加上x+11除以x+9等于x+7除以x+5加上x+9除以x+7即(x+5)/(x+3)+(x+11)/(x+9)=(x+7)/(x+5)+(x+9)/(x+7),分析后,可知分子=分母
经化简得(x+4)(x+7)=(x+5)(x+6)无解!再问:怎么能把1约掉再答:通分啊!两边就消去了!再问:怎么通分,具体步骤再答:上传了,你可以看看具体步骤再问:哪上传了再问:就是上面的吗再答:你
1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)÷(6÷7)=1÷2×3÷3×4÷4×5÷5×6÷6×7=1÷2×7=0.5×7=3.5明白请采纳,有新问题请求助,
3X/5=9.6-X0.6X+X=9.61.6X=9.6X=9.6/1.6X=6再问:5X减2.14加5.86等于2.4乘以2还是解方程回答,谢谢!再答:5X-2.14+5.86=2.4*25X+3.
x除以2-x除以5=905x-2x=9003x=900x=300
两边乘以105(x-3)-2(4x+1)=105x-15-8x-2=10-3x-17=103x=-27x=-9
1/(5-x)+2/(4-x)+3/(3-x)=-31/(5-x)+2/(4-x)=3/(x-3)-3[(4-x)+2(5-x)]/[(5-x)(4-x)]=[3-3(x-3)]/(x-3)(14-3
两边乘355(3x-4)=7(3x+3)15x-20=21x+2121x-15x=-20-216x=-41x=-41/6
即x/8-1+3=x/7x/7-x/8=3-1x/56=2x=2÷1/56x=112
共有5种算法:1/(2/3)/4/(5/6/7/8)/9=2.81/(2/(3/4))/(5/6/7/8)/9=2.81/(2/(3/4/5)/6/7/(8/9))=2.81/(2/(3/4/(5/6