4X+5X=1281.66 4X+5X=1281.66 其中X为平均数
7个回答
4X+5X=1281.66
4+5×=1281.6÷9
9×=1281.6
9×=1281.6÷9
×=142.4
相关问题
5x+4x-24=66
5(x-66)=30-4x 怎么算?
解〔5X+9(66-X)〕*82% =5X*85%+9(66-X)*80%
(5x*0.85+9(66-x)*0.8)/(5x+9(66-x))=1-0.18
解方程 (1/4)x^2+(5/2)x-66=0
X\(3\4X - 66)=9\4
3 x 6 = 27 4 x 9 = 52 6 x 5 = 66 2 x 23 =
x:y=3:2 y:z=5:4 x+y+z=66
解方程14-(5x+5-8x)=66 x=?
2x-3y+z=28 3x+4y+z=56 4x+5y-z=66