Statements
1. QT=RV
2.
3. QR+RT = QT; RT + TV=RV
4.
7. QRTV
5. QR+ RT-RT=RT+TV-RT
6. QRTV
Reasons
1. Given
2. Definition of congruence
3.
4.
5. Subtraction Property of Equality
6.
7. Definition of congruence