[5x+9x乘以(66-x)]乘以(1-18%)=1.75x+7.2乘以(66-x)
(1+40%)乘以X乘以80%—X=15
解方程2乘以0.2x-3乘以0.3x+5乘以0.4x=0.3乘以5
x乘以5加x乘以10等于多少
5乘以x的平方减18等于9x
解方程 24乘以5+5乘以(x-5)=(24乘以5 +5x)乘以0.9
3.14乘以X=16.56-X
x五次方乘以x四次方-x六次方乘以x二次方乘以x
1乘以2分之x+2乘以3分之x+.+2012乘以2013分之x=2012
若3乘以x的平方减x等于1,求9乘以x的四次方加12乘以x的三次方减2乘以x的二次方减7乘以x加2005
(x+y)9次方乘以(x+y)=
1、(x+4)乘以(x+5)
X的平方+【根号三+1】乘以X=0