求問數學問題-死人罧樓 (10個點數)

Let X be the current age of Hebrew's son.

51-X-3 = 8(X-3)
51-X-3 = 8X-24
51-3 = 8X X-24
48 24 = 9X
72 = 9X
72/9 = 9x/9
8 = X

/ = 除號

先假設Hebrew的兒子現在是x歲。

根據"The total age of Hebrew and his son is 51",
那麼hebrew的現年紀是(51-x)歲。

再睇3年前, hebrew的兒子應該係(x -3)歲,
hebrew應該就係 (51-x-3)歲吧。

最後，根據"Hebrew is 8 times as old as his son", 應可把他們寫作方程式。自己試試吧。