Properties of Equalities:
Addition Property: If a=b, then a+c=b+c
Subtraction Property: If a=b, then a-c=b-c
Multiplication Property: If a=b, then a·c=b·c
Division Property: If a=b, then a÷c=b÷c
Addition Property: If a=b, then a+c=b+c
Subtraction Property: If a=b, then a-c=b-c
Multiplication Property: If a=b, then a·c=b·c
Division Property: If a=b, then a÷c=b÷c