Question

if 15 + 3 = 8 + 10 and 8 + 10 = select choice, then select choice + 3 = 18 by the select choice property of equality

Explanation:

Step1: Calculate 8 + 10

Since \(8+10 = 18\), the first blank should be filled with 18.

Step2: Substitute the value

We know \(15 + 3=8 + 10\) and \(8 + 10=18\), so \(15+3 = 18\) by the Transitive Property of Equality which states that if \(a = b\) and \(b = c\), then \(a=c\). Here \(a = 15+3\), \(b = 8 + 10\) and \(c = 18\).

Answer:

First blank: 18; Second blank: 15; Third blank: Transitive