**The algebraic expression for ?10 more than a number? is ?x + 10? or ?10 + x?.** The ?x? in the expression is called a variable, which can be represented by any letter in the alphabet.

An algebraic expression is a mathematical expression that consists of numbers, variables and operators, and its value can change. Some basic mathematical operators are +, -, x and /. The given phrase states that a result can be obtained by adding 10 more to the variable. The variable ?x? can be replaced by any number. If x equals 2, then the expression x + 10 has a value of 12.