(127-4x)除以5=19
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5.4-3/x=55.4x-5x=30.4x=3x=7.5(3.7-x-3.2)=10x=3.7-3.2-10x=--9.5
(5x-2)/(x-1)+1=(4x+5)/(3x-3)(5x-2+x-1)/x-1=(4x+5)/(x-1)*36x-3=(4x+5)/314x=14x=1
再问:240哪来的(≧^ω^≦)再答:全部扩大24O倍,去掉分母
x/3+y/4=9/10(1)x/5+y/4=7/10(2)(1)-(2)得:2x/15=1/5x=3/2代入(1)得:y/4=2/5y=8/5所以:方程组的解是:x=3/2;y=8/5
x/2+x/3+x/4=6x/12+4x/12+3x/12=13x/12=65所以x=65除以13/12=60
3x除以3-x除以3=5分之43x/3-x=12/515x=12(3-x)15x=36-12x27x=36x=4/3
x/(5/4)=80%x/(5/4)=0.8=4/5所以x=(5/4)*(4/5)x=1
答:6/x=(1/2)/(1/5)6/x=5/25x=12x=12/5经检验,是原分式方程的根0.2/25=4/x所以:0.2x=4*250.2x=100x=500经检验,是原分式方程的根
(5x-1200)/(4x-1000)=13/105x-1200=13(4x-1000)/105x-1200=26x/5-1300-x/5=-100x=500
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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,
化成小数0.25x+0.4x=1.30.65x=1.3x=1.3÷0.65x=2
两边乘15-3(x-3)=3x+4-3x+9=3x+46x=5x=5/6
x除以2-x除以5=905x-2x=9003x=900x=300
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
x除以0.05除以2=(4500-x)除以0.02除以4化简成8x=10(4500-x)是对的,8x=45000-10x18x=45000x=2500
(x-5)/4=4x/184*4x=18(x-5)16x=18x-902x=90x=45
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