(1+0.4)x乘以0.9-20= x+448这道方程怎么解

(1+0.4)x乘以0.9-20= x+448这道方程怎么解 x乘以x+1乘以x+2乘以x+3=3024怎么解? (1+40%)乘以X乘以80%—X=15 (1+40%)乘以X乘以80%—X=15 (1+40%)乘以X乘以80%—X=15 [5x+9x乘以(66-x)]乘以(1-18%)=1.75x+7.2乘以(66-x) 解方程2乘以0.2x-3乘以0.3x+5乘以0.4x=0.3乘以5 2x乘以x乘以x=24,求x! 25乘以(20-x)=30乘以15 已知3乘以x的平方-x=1,求6乘以X的立方+7乘以x的平方-5乘以x+2007的值 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 25x=25x乘以10乘以0.9+5x 怎么解 (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 X乘以X等于40 ---------------------X=? 6乘以4-0.5x=12.8 （24.5-x）乘以2-13=20 5x-x+1.8=3.6 （x+2.1）除以3=10.5 3.5乘以x=105 13.06-x=8.07 0.2（x-3.5）=1 12x-3.5x+85 1.2x-x=35 3-3x=0.3 3.5乘以6-0.2x=11.4 3.5乘以（6-0.2x）=17.5 f(x)=1-(x/|x|),g(x)=|x|,求h(x)=f(x)乘以g(x)