Answer:
Addition Property of Equality
Step-by-step explanation:
Given:3 ● m∠Q − 17 = 30, then 3 ● m∠Q = 47.
3 ●m∠Q - 17 = 30
Here we have to find the m∠Q. To find the angle use inverse operation of subtraction.
The inverse operation of subtraction is addition.
Here we have to get rid of -17, the inverse operation of "-" is "+"
So, add +17 on both sides, we get
3 ●m∠Q - 17 + 17 = 30 + 17
3 ●m∠Q = 47
Therefore, we used Addition property of equality.
