Question

What is 3a + 5b - 7b ?

Answer 1

3a + 5b - 7b

don't need to combine like terms (it is done already )

5b-7b=-2b

Answer:

3a-2b or -2b+3a

Answer 2

`3a + 5b - 7b`

is an expression. It can also be simplified to:

`3a - 2b`