Question

Can someone please explain to me what the "subtraction property of equality" is?

Answer 1

It means that when both sides of an equation have the same number subtracted from them the remaining expressions are equal.                                                                                                                ( ......Hope that I helped you...... )
                                                                                    

Answer 2

The subtraction property of equality means that
a=b and c=d then a-c=b-d or
a=b and c=c, then a-c=b-c
basically when 2 things are equal, and you subtract the same value from both sides, the equation remains equal

or
a+c=b=c simlifies to a=b where you can simlify the same thing from both sides and retain the equality