3 4:11 12=x:1 20
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(56-X)=3(34-X)56-X=102-3X2X=46X=23
X=0或者+∞
x+4x=x+120x+4x-x=1204x=120x=30(等号最好对齐写)
3x+4(9-x)=343x+36-4x=34-x=-2x=2
x-2/5x+120=3/4x0.6x+120=0.75x0.15x=120x=800
(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
如果我没理解错,而你的题目又是正确,我又没算错的话,那么会有:x+2x+2x*2=1202x*2+3x-120=0根据公式a(x+b/2a)^2=(b^2-4ac)/4a求得x=-987/16一般最好
x+五分之一x=2406/5x=240x=200x-60%x=1600.4x=160x=40050%x-33%x=340.17x=34x=200120x-20x=40100x=40x=0.4x+130
2.2x=44,x=200.3x=54+18=72,x=240
3.5x+5x=348.5X=34X=34/8.5X=4
2x²+20x=120x²+10x=60x²+10x+25=60+25(x+5)²=85x+5=±√85x=-5-√85,x=-5+√85
(X*X-X)/X=120X²=121XX=121或X=0(舍去)所以X为121
50X+40X×(2.5X)=12050X+100X=120150X=120X=120/150X=0.8
30%x=12030x=12000x=400x-60%x=16040%x=16040x=16000x=400120x-20x=40100x=40x=0.450%x-33%x=3417%x=3417x=
需要过程?再问:嗯嗯*^O^*再答:数有点大稍等再问:好的好的^W^再答:问题没错?再问:没错再问:算不出来么?再答:整理出来4x^2+475x+380=0再问:那估计是数抄错了还是要谢谢你^W^
(1)X+40%X=28, (1+40%)X=28, &nb
x-15%x=34x=40x+120%z=180(题目有误,请审核原题)40%x=60X=15070%x-45%x=100X=4001/4x+20%x=9X=2030%x=9X=3070%x-55%x
没法解,化简得:x[2x^2/(x^2-y^2)]=120/288若x=ty;则有t^2y/(t-1)=60/288.无穷解若方程为:X/(Y+X)+X/(X-Y)=120/288x^2/(x^2-y
7x²*2=120x²=60/7x=-2√105/7,x=2√105/7