40x+(2x+0.11)乘以40=258.8

40x+(2x+0.11)乘以40=258.8 X乘以X等于40 ---------------------X=? (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 (60-2x)(40-x)=60乘以40/2 2x乘以x乘以x=24,求x! 2x+40-20=(x-20)乘以4 x乘以x+1乘以x+2乘以x+3=3024怎么解? 已知X小于等于25,求X乘以（40－X）／2的最大值 （x+40%x）乘以80%=224 1.若2x+5y=4 求4^x乘以32^y2.已知5乘以25^x乘以125^x=5^21 求x^3 x-120=2乘以(x-200) 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= 25乘以(20-x)=30乘以15 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