Answers

2015-01-13T18:53:08+08:00
In other words, we can say: the distance of x from 9 is 5 units
That distance of 5 units may be 5 units ahead (+5) or 5 units behind (-5)
We have 2 equations:

x-9=5 or x-9=-5
Solving for x for each statement, we have:
x=14 or x=4

Therefore, x=4, 14
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