Question

what is 4y - 1 - 3y + 2 simplified?

Answer 1

Step 1- Gather like terms.
(4y  - 3y ) - 1 + 2
Step 2- Simplify.
y - 1 + 2
Step 3- Simplify 
Answer = y + 1

Answer 2

gropu like terms
we can move them because commutative property that says a+b=b+a

4y-3y-1+2
4y-3y=1y
-1+2=2-1=1

1y+1
y+1