解〔5X+9(66-X)〕*82% =5X*85%+9(66-X)*80%
2个回答
X =
15996/251
相关问题
(5x*0.85+9(66-x)*0.8)/(5x+9(66-x))=1-0.18
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程14-(5x+5-8x)=66 x=?
3 x 6 = 27 4 x 9 = 52 6 x 5 = 66 2 x 23 =
X\(3\4X - 66)=9\4
4X+5X=1281.66 4X+5X=1281.66 其中X为平均数
X—2/5x=66 (怎么解这道方程)
简便计算、急!2.9+29.9+299.9+2999.9、65X65/66、 12/7-(3/8+5/7)、65/66=