McGraw Hill Integrated II, 2012
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McGraw Hill Integrated II, 2012 View details
4. Proving Angle Relationships
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Exercise 43 Page 307

In the equation, b has been replaced by 3.

Substitution Property

Practice makes perfect
To identify the property being demonstrated by the given equations, we should first identify the operation being performed.

Ifa- b=xand b= 3, thena- 3=x. In this case, b has been replaced by 3 in the equation. This demonstrates the Substitution Property of Equality.