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12.7= 7b what is the value of b?

12.7=7 b  What property does this equation illustrate? What is the property of b? 
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3 Answers

If you divide both sides of the equation by 7, you will get the value of b.  This uses the division property of equality.
~Lynne R.
If one were to look at this equation carefully, the equation could be reworded in a different but similar scenario:
a(b)=(b)a where a(b) is just the inverse of (b)a (Commutative Property of Multiplication)
Similarly, if a=7 then you get the scenario from the given equation:
-Andy Lai, Polymath Tutor
 It is trivial really divide both sides of equation by 7.