標題:

[在線等~] F.1數學題兩條

發問:

1.72 marbles are divided into two groups. 7 times the number of marbles in the smaller group is equal to 5 times that in the larger group. Find the number of marbles in the smaller group. Let the number of marbles in the smaller be x, then that in the larger group is (72-x) 2. The total age of... 顯示更多 1. 72 marbles are divided into two groups. 7 times the number of marbles in the smaller group is equal to 5 times that in the larger group. Find the number of marbles in the smaller group. Let the number of marbles in the smaller be x, then that in the larger group is (72-x) 2. The total age of Hebrew and his son is 51. 3 years ago, Hebrew is 8 times as old as his son. Find the current age of Hebrew’s son. 更新: 要用方程解題~

最佳解答:

1. 7x = 5 * (72 - x) 7x = 360 - 5x 12x = 360 x = 30 2 Let Hebrew's age be x and his son is y x + y = 51 (x - 3) = 8 * (y-3) (51 - y - 3) = 8 y - 24 51 - 3 + 24 = 8y + y 72 = 9y y = 8 Hebrew's son is 8 years old

其他解答:

aa.jpg

 

此文章來自奇摩知識+如有不便請留言告知

1. Let x be the number of marbles in the smaller group, 7x=5(72-x) 7x=360-5x 7x+5x=360 12x=360 x=30 2. Let x be the current age of Hebrew's son. x+3+8x+3=51 9x=51-6 x=45/9 x=5
arrow
arrow
    文章標籤
    大月 方程 解題 更多 八字
    全站熱搜

    hzb53jl55v 發表在 痞客邦 留言(0) 人氣()

    E-mail轉寄