The term is: 100/x
x + 12. If the unknown number is represented by x, the expression for a number increased by 12 would be x + 12.
x is a variable that represents an unknown number and its value depends on the algebraic expression it is used in.
an other expression for a unknown number an other expression for a unknown number
The expression that represents the product of a number 5 and b is 5b.
The expression which represents half the sum of five and a number b is (b+5)/2.
The word "variable" represents an unknown number.
Let the number be x and so the expression is 4x -3