The two column proof has shown that x = 5 by Division Property of equality,
How to solve the two column proof?
The two column proof to show that x = 5 is as follows:
Statement 1: T is the midpoint of SU
Reason 1: Given
Statement 2: ST = TU
Reason 2: Definition of midpoint
Statement 3: ST ≅ TU
Reason 3: Definition of congruent segments
Statement 4: 7x = 3x + 20
Reason 4: Substitution Property
Statement 5: 4x = 20
Reason 5: Subtraction Property of Equality
Statement 6: x = 5
Reason 6: Division Property of equality