In the expression "a + b," the letter "b" represents a variable. A variable is a symbol that represents an unknown value or quantity. It can take on different values, depending on the context of the problem or equation. So, in this case, "b" is a variable that can have any value.
In the expression "a+b", the letter "b" represents a variable. In algebra, variables are used to represent unknown values. The expression "a+b" shows that we are adding the value of the variable "b" to the value of another variable or number, "a". To determine the result of this expression, you need to know the values of both "a" and "b".
