Question

Simplify: 19x – y – 2z + x + 5y + 2z

Answer 1

18x+4y

Answer 2

that answer is not on there

Answer 3

combine like terms: remember that lone variables have a 1 in front of them (ex: -y = -1y)
combining them looks like this:
\[\color{red}{19x}-\color{green}{1y}-\color{blue}{2z}+\color{red}{1x}+\color{green}{5y}+\color{blue}{2z}\]
\[\color{red}{(19+1)}x+\color{green}{(5-1)}y+\color{blue}{(2-2)}z\]
simplify that and you will have your answer.

Answer 4

what are your choices..?