Write an expression equivalent to (6x + 4y) – 2y by combining like terms.

Answer 1

So, let's say we have 3 Ashlyns plus 4 Ashlyns. That would total 7 Ashlyns, right? If there was also one David, that wouldn't make 8 Ashlyns. It would be 7 Ashlyns plus David (calling me 1 David is silly, but "David" implies "1 David).

What do we have? 6x + 4y - 2y. We can take out the parentheses without affecting anything. 4y - 2y is like 4 Georges minus 2 Georges, so we are left with 2y. 6x is not the same; it's like 6 Susans and not 6 Georges, so we just have...

6x + 2y

We put the terms in alphabetical order.

Hope this helps!

Answer 2

(6x+4y) -2y = 6x+4y-2y

Only the y's can be combined. Cannot add x's to y's!

6x +(4y-2y) = 6x +2y