(X-120)[70-(X-130)]=1600 ,
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(X-120)[70-(X-130)]=1600,(X-120)[70-(X-130)]=1600,(X-120)[70-(X-130)]=1600,(x-120)(200-x)=1600x平方-32
(X-120)[70-(X-130)]=1600 ,
(X-120)[70-(X-130)]=1600 ,
(X-120)[70-(X-130)]=1600 ,
(x-120)(200-x)=1600
x平方-320x+25600=0
(x-160)平方=0
x1=x2=160
(X-120)[70-(X-130)]=1600 ,
(x-120)(70-x+130)=1600 解方程
(X-120)(X-130)=1600
2+120%x=70%x
(130+X)(70-X)-120X=1600怎么解出来?请明确的过程
(X+X)+(X-X)+(X*X)+(X/X)=100
x+(x-12)+(x-8)=70
40%x+70%x-x=1.8
x(120+x)*80%=x-76
x(x+1)(x-1)=120
x-x/4-120=x/2
0.5X+120+0.3X=X
x/(120-x)=x/60
x/(120-x)=(60-x)/60
25%X+三分之一X+120=X
536-120%x-x=x-80
解方程:70%x+(70%x-2)=(x+130%x-2)×60%
x+(x+20)+(x-10)+70+x=540 .