X+10 Explanation: Break down the information given to you to try and identify what the algebraic expression must looks like. You know that you're dealing with a sum → this means that you are adding something, so you're going to use the + sign;
of a number → this means that you're dealing with a variable. The most common notation for a variable is x .
and 10 → this is simply an integer that must appear in the algebraic expression along the variable x .
So, put all this together to get x + 10 You're adding an unknown number, x , to an integer, 10
