Answer:
b. Angle Addition Postulate; Addition Property of Equality
Step-by-step explanation:
Angle Addition Postulate is that if you place two angles side by side, then the measure of the resulting angle will be equal to the sum of the two original angle measures.
The additive property of equality states that if the same amount is added to both sides of an equation, then the equality is still true.
[tex]2x-12=100\\(2x-12)+12=100+12\\2x=112[/tex]
