(28-X) (18-X)=24

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(28-X) (18-X)=24
24:x=36:18,x=?

24:x=36:18根据内项之积=外项之积得,36x=24×18解得x=24×18÷36x=12

6%x+19x=22.5 70%x-18%x=3.12 28%x+37%x=22.75 78%x=39

6%x+19x=22.50.06x+19x=22.519.06x=22.5x=22.5/19.06=1.1870%x-18%x=3.120.7x-0.18x=3.120.52x=3.12x=628%x

x+(x+24)+(x+4)/2=7x

两边乘22x+2x+48+x+4=14x14x-2x-2x-x=48+49x=52x=52/9

14X-8X=12 20X-50=50 28+6X=88 24-3X=3 99X=100-X X+3=18 X-6=12

14X-8X=12x=220X-50=50x=528+6X=88x=1024-3X=3x=799X=100-Xx=1X+3=18x=15X-6=12x=1856-2X=20x=184X+2=6x=1X

X^3-7X^2+18X-24=0

可以拆项:X^3-7X^2+12X+6X-24=0X(X^2-7X+12)+6(X-4)=0X(X-3)(X-4)+6(X-4)=0(X-4)(X^2-3X+6)=0如果需哟啊进一步化简,需要拆分后面

(X+X)+(X-X)+(X*X)+(X/X)=100

(X+X)+(X-X)+(X*X)+(X/X)=1002X+0+X*X+1=1002X+X*X=99X(X+2)=99X=9再问:请问X(X+2)=99解为什么就等于9了呢没看懂再答:换成算术法你就明

问18x+37=51.4 x=?9x-7x=50 x=?5x+6x=16.94 x=?12x/4=24 x=?

18x+37=51.418x=14.4x=0.89x-7x=502x=50x=255x+6x=16.9411x=16.94x=1.5412x/4=2412x=24×4x=96÷12x=8

x(x-1)=18

x(x-1)=18x-x=18x-x+1/4=18+1/4(x-1/2)=73/4x=1/2±√73/2

X+13%X-28%X=3.

X+13%X-28%X=3.4x+0.13x-0.28x=3.41.13x-0.28x=3.40.85x=3.4x=4

6x+19x=22.5 x+17%=9.36 78%x=39 70%x-18%x=3.12 12x+53=137 28%

6x+19x=22.5(6+19)x=22.515x=22.5x=1.5x+17%=9.36x+0.17=9.36x=9.36-0.17x=9.1978%x=39x=39÷78%x=39÷0.78x=

x-0.7x=18

0.3X=18X=60

已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值

设x1=4-√3,x2=4+√3,是方程X^2-8X+13=0的两根所以X1^2-8X1+15=2X^4-6X^3-2X^2+18X+23=(X+1)^2*(X^2-8X+13)+10=10所以原式=

计算1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=?

1/[x(x+3)]+1/[(x+3)(x+6)]+.+1/[(x+15)(x+18)]=1/3[1/x-1/(x+3)]+[1/(x+3)-1/(x+6)]+.+[1/(x+15)-1/(x+18)

(x-22)+(x-24)+(x-27)+(x-20)=x

(x-22)+(x-24)+(x-27)+(x-20)=xx-22+x-24+x-27+x-20=x4x-93=x4x-x=933x=93x=31

x+24=4.5X

x+24=4.5x24=4.5x-x24=3.5xx=48/7

30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1

28X=84X=30.8X=60X=751.6X=8X=53X=24X=80.5X=1X=2再问:要过程啊我这是作业汗快点把我很急谢谢你啊再答:30X-2X=8428X=8428X÷28=84÷28X

X+5X=18

(5+1)X=186X=18X=3

x^2=(x+30)X(x-18)怎么解

问题是不是X2=(X+30)*(X-18)啊?要是上面的话就这样X2=X*X-X*18+30*X-30*18=X2+12X-540移项得:X2-X2-12X=-540,即-12X=-540,X=45*

x+13%x-28%x=3.4

x-0.15x=3.40.85x=3.4x=4