Answer: B (5x - 4y)
Explanation:
Well, let’s take a look at the like terms:
3x and 2x
AND
3y and 7y
So, now let’s solve it!
= 3x + 2x + 3y -7y
Lets add the 3x and 2x first! Keep in mind, it doesn’t matter which like terms are combined first!
= 5x + 3y - 7y
Now, let’s combine the 3y and 7y! Here, they are using subtraction! You can just leave the 5x there!
= 5x - 4y
That is your final answer!