80%乘以X+(500-X)乘以60%=500X74%怎么做500X74%那个X是乘号

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80%乘以X+(500-X)乘以60%=500X74%怎么做500X74%那个X是乘号
80%乘以X+(500-X)乘以60%=500X74%怎么做
500X74%那个X是乘号

80%乘以X+(500-X)乘以60%=500X74%怎么做500X74%那个X是乘号
0.8x+0.6*500-0.6x=0.74*500x
370x-0.2x=300
x=0.81124
或者
0.8x+0.6*500-0.6x=0.74*500
0.2x=70
x=350

X=350

(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 80%乘以X+(500-X)乘以60%=500X74%怎么做500X74%那个X是乘号 2x乘以x乘以x=24,求x! 五分之一乘以x-2=80% x乘以x+1乘以x+2乘以x+3=3024怎么解? 800乘以x+500乘以x=830000求x等于多少 lgx 乘以 log10 x=? 0乘以X=多少 X乘以X等于40 ---------------------X=? 5x减12乘以60%=55x减12乘以60%=5 70X+5乘以80=4乘以30X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 x乘以5乘以x等于多少 25乘以(20-x)=30乘以15 (60-2x)(40-x)=60乘以40/2 （x+40%x）乘以80%=224 3乘以x的平方-80x=400