Question

Alina has just recieved 3 video games for her birthday to add to her existing 12 video games. A week later she went to the thrift store and doubled her video games. Another week she bought 5 more games what's the numerical expression for the total amount of video games alina has now

Answer 1

Let the existing no. of video games she had be x,
then 
(3+x)+2x+5