x-120=2乘以(x-200)

x-120=2乘以(x-200) 2x乘以x乘以x=24,求x! x乘以x+1乘以x+2乘以x+3=3024怎么解? 解方程2乘以0.2x-3乘以0.3x+5乘以0.4x=0.3乘以5 （2x²）²乘以x³+（x²）³乘以x= 化简0.5x乘以x乘以y乘以x-y乘以x乘以x^2+0.5x乘以x乘以y x乘以2x=400000那么,x等于多少 y=|x|/x乘以2^x的单调性 y=|x|/x乘以2^x的单调性 30乘以3X乘以2+2（20-6X）乘以2X=4份之一乘以20乘以30 30乘以3X乘以2+2（20-6X）乘以2X=4份之一乘以20乘以30 x乘以Y=x乘以（1-10%）乘以Y+x乘以（1-10%）乘以2 等于多少啊 (1乘以2x+3)+(x乘以-x)=0 怎么算 1乘以2分之x+2乘以3分之x+.+2012乘以2013分之x=2012 方程:15乘以(3x-8)-4乘以(2x+3)=6乘以(4x-4)-4怎么解 X乘以X等于40 ---------------------X=? 五分之一乘以x-2=80% 2乘以（X+12.5）=34