20×x
20×x is a mathematical expression that represents the product of 20 and an unknown variable x. This expression is commonly used in algebra to represent a linear relationship between two quantities. The value of 20×x depends on the value of x. For example, if x is 3, then 20×x equals 60. If x is 5, then 20×x equals 100. The expression 20×x can be simplified to 20x, where the multiplication sign is implied. This expression is a fundamental concept in mathematics and is used in various fields such as physics, engineering, and economics to model relationships between variables. It is also used in programming and computer science to represent arrays and other data structures.