括号x-3除以2等于7.5-搜答案-搜搜考试网

题是这样的不,x/4+2x/3+x/2=51去分母得：3x+8x+6x=712x=612/17x=36

x-2除以6-x+2除以3等于1+x-1除以2两边乘6x-2-2(x+2)=6-3(x-1)-x-6=9-3x3x-x=9+62x=15x=7.5

120÷（x-60）=3分之1则x-60=120*3x=360+60x=420

402/3=134312/3=104342/3=114...832/8=104912/8=114992/8=124...太多了

1/(x-1)+1/(x-4)-[1/(x-2)+1/(x-3)]=0通分(2x-5)/(x²-5x+4)-(2x-5)/(x²-5x+6)=0(2x-5)[1/(x²-

1÷（x+2÷3）=4÷51=（4÷5）×（x+2÷3）1=五分之四x+8÷151-8÷15=五分之四x7÷15=五分之四x五分之四x=7÷15x=（7÷15）×（5÷4）x=十二分之七约分：意义：把

6/3(1+2)=2*(1+2)=6

答案是x1=-0.5和x2=2答：你所说的式子是：2*（x^2+1)/X^2-{3(X+1)/X}-1=0即(2X^2+2)/X^2-{(3X-3)/X}-1=0等号两边都乘以X^2得2X^2+2-X

90呗,逆运算啦

x/2-x/3=163x-2x=96x=96

(x-3)/2+3≥x(①)且1-3(x-1)＜8-x(②)解①式得：x-3+6≥2x3≥x即：x≤3解②式得：1-3x+3＜8-x4-8＜-x+3x2x＞-4x＞-2综合①②得：不等式组的解集是-2

1000÷（x+2）=50x+2=1000÷50x+2=20x=18

x+x/2+x/3=5511x/6=55x=30

x/(2/3)=75%,x=3/4*2/3,x=1/2

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