Question

5 + (6 + 7) = (5 + 6) + 7?

Answer 1

36

Explanation:

First (6+7) is first and that equals to 13

Then add 13 to 5 which equals to 18

so 18 x 2 is 36

Answer 2

this is the commutative property if that's what you need to know

if not, then both sides equal 18