Let's clear out the fraction(s):
Mult. all 3 terms by 3, obtaining 18 = 3x + 2. Simplifying, 16 = 3x.
Then x = 16/3 (answer).
Check: does (16/3) + (2/3) = 6? Yes, since 18/3 = 6.
If there are multiple operations at the same level on the order of operations off from left to right and you work like this first noticed that there are no parentheses or exponents so we moved to multiplication and division with any sense of parentheses
I assume you know about the dot product, and that for two vectors
and
, the angle between them
satisfies

Then the vectors are parallel if the angle between them is 0 or 180 degrees (0 or pi radians), which would make
or
, respectively.
Part A)



Then the angle between
is such that

so these vectors are parallel ("antiparallel", more specifically, which means they are parallel but point in opposite directions).
Part B) involves the same computations:

has the same components but differing by sign and order, as
; its magnitude remains the same, though:



which is neither 0 nor pi, which means these vectors are not parallel.
Its 2/3 divided in half.
It's 1/3 Im pretty sure