100x+70(120-x)=1600
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100x+70(120-x)=1600
100x+70(120-x)=1600
100x+70(120-x)=1600
100x+70(120-x)=1600
100x+8400-70x=1600
30x=-6800
x=-680/3
30x=1600-8400=-6800
x=-680/3
x=-3/680
100x+70(120-x)=1600
(X+X)+(X-X)+(X*X)+(X/X)=100
(X-120)[70-(X-130)]=1600 ,
x/(120-x)=x/60
(120+X)/120=X/100
(130+X)(70-X)-120X=1600怎么解出来?请明确的过程
x+(x+20)+(x-10)+70+x=540 .
X[X/(Y+X)+X/(X-Y)]=120/288 求X/Y
(x+x)+(x-x)+(x/x)=11.2
3x*x=1600+x*x-80x
X+X+X+X+X+X+100X=1690 问:X等于多少
(x+1)X百分之三十+(100-X)X百分之二十五=2/5X
x*x*x*x+2008x*x+2007x+2008(提示:x*x*x-1=(x-1)*(x*x+x+1))
(x-120)(70-x+130)=1600 解方程
(x-120)/120=(120+x-100)/(x-120+100)
(X-120)(X-130)=1600
解方程:x-15%x=34 x+120%z=180 40%x=60 70%x-45%x=100 1/4x+20%x=9 30%x=9 70%x-55%x=180 x+40%x=420
解方程 (x+120)/90=(x-120)/70