100减3x 除以2等于8
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根据题意知:X/3=Y/4=Z/5设X/3=Y/4=Z/5=K则X=3K,Y=4K,Z=5K所以(X+Y)/(X-2Y+3Z)=(3K+4K)/(3K-2*4K+3*5K)=7K/(10K)=7/10
x-x/100=0.6930.99x=0.693x=0.7
x/80-x/100=3两边同乘400得:5X-4X=1200合并同类项得:X=12001200是方程的解
x/30-2=x/35等式分母同时乘以2107x-420=6x7x-6x=420x=420
4/(x-1)-1/(2x-1)-2=4(2x-1)/(x-1)(2x-1)-(x-1)/(x-1)(2x-1)-2(x-1)(2x-1)/(x-1)(2x-1)=(8x-4-x+1-4x²
是(x-1)/(x-2+1)=3吗x-1=3x-3无解
再答:答案1/4
x/2-x/3=163x-2x=96x=96
解方程:1/(X-1)+2/(X-2)=3/(X-1)2/(X-2)=2/(X-2)变成了:X-2=X-1方程无解的,是题目有问题吧
(x减4.2)除以3等于8x-4.2=24x=4.2+24x=28.2
x+x/2+x/3=5511x/6=55x=30
x÷2+x÷8-x÷3=4.212x+3x-8x=100.87x=100.8x=14.4
x÷(3/2x)=x-3/22x^2/3-x=3/24x^2-6x=9(2x-3/2)^2=9+9/4x=(±根号下45/4+3/2)/2
3x除以4等于2y除以5两边乘以4/3左边=x右边=y*2/5*4/3=y*8/15所以x除以y等于8除以15
5*3-x÷2=8得15-x/2=8得x/2=15-8得x/2=7得x=14