2(4-x)=0.8
20+0.8x=x-14 112-4x=2x(80-4x)
4x(5x-2)=3(5x-2)
(3x+2)(x+3)=x+4
5x-2=3x+4 x等于什么?
x-4/1x=8/3 x-0.8x=22 3/2x+2/1x=42
解方程:x(2X-3)+2x(x-1)=4x(x-2)+9
0.3x²+x=0.8 x²+3=2√3x x²+2x-2=0 3x²+4x-7
六道解方程4×(0.8-x)=1.45+2/3x-1/2x=1210x+9=8x+19115%x+15%x=1.32x-
先化简,再求值:3x^3-[x^3+(6x^2-7x)]-2(x^3-3x^2-4x),其中x=-1/3
解方程:x-19分之5x-96+x-9分之x-8=x-6分之4x-19+x-8分之2x-21
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
通分x+4/x*x+4x与x-5/x(x-5)-2(x-5)