Answer:
4x+5
Explanation:
1. You collect all the like-terms together which would be 7x and 3x
so it would be 7x-3x which would be 4x
since 7-3=4
them we collect 4x and 5 and we get 4x+5
make sure you write the variable answer first
Hope this helps and answers your question! Have a great day/night!