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標題:
English Maths
發問:
The dfference between the present ages of Mr.Chan and hs son is 32. 6 years later, their total age will be 50. How old is Mr. Chan's son now?
最佳解答:
Let x be the current age of Mr. Chan's son, so (x + 32) is the current age of Mr. Chan. (x + 6) + [(x + 32) + 6] = 50 2x + 44 = 50 x = (50 - 44) / 2 = 3 Mr. Chan's son is 3 years old.
其他解答:
Assume Mr chan's age is x and his son's age is s 6 years later: (x - 32 = s) = (x + s = 50) (x = 32 + s) = (x = 50 - s) 32+s = 50-s 32+2s= 50 2s=18 s=9 9-6=3 His son is 3|||||Let x+32 and x be the present ages of Mr Chan and his son then x+38 and x+6 will be the ages after 6 years (x+38)+(x+6)= 50 2x + 44 = 50 x=3
English Maths
發問:
The dfference between the present ages of Mr.Chan and hs son is 32. 6 years later, their total age will be 50. How old is Mr. Chan's son now?
最佳解答:
Let x be the current age of Mr. Chan's son, so (x + 32) is the current age of Mr. Chan. (x + 6) + [(x + 32) + 6] = 50 2x + 44 = 50 x = (50 - 44) / 2 = 3 Mr. Chan's son is 3 years old.
其他解答:
Assume Mr chan's age is x and his son's age is s 6 years later: (x - 32 = s) = (x + s = 50) (x = 32 + s) = (x = 50 - s) 32+s = 50-s 32+2s= 50 2s=18 s=9 9-6=3 His son is 3|||||Let x+32 and x be the present ages of Mr Chan and his son then x+38 and x+6 will be the ages after 6 years (x+38)+(x+6)= 50 2x + 44 = 50 x=3
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