Factorize : x+y2x+3y-x+yx+1

Matching exercise

    
Match the items on the right to the items on the left.
Step 1
Step 2
Step 3
x+y2x+3y-x+yx+1=x+y2x+3y-x+1
=x+y2x+3y-x-1
=x+yx+3y-1