Question

Given the example operations below, which “Property of Congruence” or
“Property of Equality” justifies going from the first statement to the second?
(check your notes! Don’t do this from memory!). The first answer has been
provided for you.

1)
3x + 7 = 19
3x = 12: Subtractive Property of Equality

2)
4x = 20
x = 5

3)
∠1≅∠2 and ∠3≅∠2
∠1≅∠3

4)
5x-4=15
5x=19

Thanks :)

Answer 1

for those whom it's not clear to, the answers aren't given except the first one
it's asking for the properties, eg Subtractive Property of Equality