Answer:
11-2x not 13x
Explanation:
\(6-2)x + (5-4)x does = 13x
If there were parentheses as in the 2nd line, everything else is correct
the mistake is going from
6-2x + 5-4x to
(6-2x) + (5-4)x
PEMDAS is the order of operations. P for parentheses 1st, Multiplication 3rd, addition 4th, subtraction 5th
(there are no exponents or division or parentheses, so it's just M, A and S that apply)
combine like terms, 2x-4x =-2x
combine the constant terms 6+5 = 11
6-2x +5-4x = 11-2x
The mistake was assuming parentheses when they aren't there.
correct answer is 11-2x not 13x