Question

-y + 2y = what ? Please help and why is it negative or positive ?

Answer 1

Explanation:

-y is the same as writing -1y. if we forget about the y’s, -1 + 2 = 1. so -1y + 2y = 1y, or just y to be simpler :)

i hope this helps :)

Answer 2

`-y+2y=2y-y=(2-1)y=y`

It is positive because the coefficient is positive.