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Addition property of equality
if a=b then a+c=b+c
you can add any real number to both sides of the equation 3x+=y then 3x+7=y+2
Multiplication property of equality
if a=b the ac=bc
here you are multiplying both sides by c
you can multiply both sides of an equation by any real number
a+b and ab are unique real numbers
whenever you add or multiply 2 real numbers together you get a real number
you can change the order of numbers you are adding or multiplying
you can change the grouping of numbers that are being added or multiplied
a) opposites or additive inverses:
any number plus its opposite equals 0
x+ (-x)= 0
b)reciprocals or multiplicative inverses:
any number times its reciprocal = 1
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