中1數學題`

If the sum of two consecutive even numbers is 86,find the two numbers.
[hints:the difference between two consecutive even number is 2.]
solution;let the smaller number be X.Then the larger numbers will be _x+2___.
x+___x+2___=86

Solution:
2x+2=86
2x=86-2=84
x=84/2=42

So,
The smaller number is 42, the larger number is 44.

問笞係44 lo

2007-08-17 00:01:26 補充：
ｓｏｒ，打錯左，答案係44 lo

x+x+2=86
2x+2=86
2x=86-2
2x=84
x=42
The large number is x+2=44