9/20*X=(X+16)/4
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
X 7 X - X 7 X = X 9 8 X 9 X - X 9 X = 4 9
16x-(4+3x)=9(x+4)
16x-[4+3x]=9[x+4]
x-4/x-5 - x-5/x-6=x-7/x-8 - x-8/x-9求x=?
(1)16x-40=9x+16是多少?(2) 4x=20/3x+16 (3)2(3-x)=-4(x+5) (4)3(-2
解方程:(1)16x-40=9x+16 (2)4x=20/3x+16 (3)2(3-x)=-4(x+5)
4x+9x=13x
4x=20/3x+16
请解出下列四道方程13.2x+9x=33.35.4x+x=12.88x-3x=105x-0.36x=16
x-3(20-x)=3x-7(9-x)