Algebra Math Help

I do not understand … Help?

Its supposed to name just what the identity or equality is propery. Are my answers correct? Http: / / www.glencoe.com/sec/math/algebra/algebra1/algebra1_05/study_guide/pdfs/alg1_pssg_G004.pdf these are my options if I do not remember. 2. If x + y = 3, then 3 = x + and symmetric property of equality 9. If 12 = 17 -5 then 17-5 = 12 symmetric property equal 16. 8 +5 = (4 +4) + 5? Now …. Evaluate each expression, property name is displayed at each step. 18. 2 6 (9-3 squared) – 2 19. 5 (13-39 / 3) + 7 X 1 20. 7 (16 / 4 squared)

16. substitution property of equality: if a = b, then one may be replaced by b in any expression seen at 18, 19 and 20 pm – is a property that says that a lower figure itself is zero? (Used in 18 and 19) or a property that says that a number divided by itself is always one?

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