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OpenStudy (anonymous):
If x - 3 = 12, then what is the value of x - 3 + 3? Why? (
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OpenStudy (anonymous):
The value of x - 3 + 3 is 15. If you solve for x in the first equation you get 15. The subtracting and adding of three in the second cancels out so you are left with just 15.
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