X-1/x=2 then find the value of x^5+1/x^5

(-6.7 + 4.3) - 1.2
(4.3 - 6.7) - 1.2...step 1
4.3 - (6.7 + 1.2) ..step 2
4.3 - (7.9)...step 3
-3.6...step 4

I know it is not 4, because his answer is correct. And on step 2, he didn't distribute. This is a little confusing to me because I thought there had to be an equal sign in there to do the propertiesmy guess would be :
Morris uses the commutative property in step 1.