The symbols 17 x 68 form an algebraic equation. An expression or algebraic expression is any mathematical statements which consist of numbers variables and an arithmetic operation between them. Examples are x 3 1 and y 4 x 2 2xy yx 1 12.
If you are asked to fill in the box you can do the simple arithmetic and know that the answer should be 3.
An equation in the form of a polynomial having a finite number of terms and equated to zero as 2 x 3 4 x 2 x 7 0. Twice a number is eighteen. The following are some examples of equation. It can be an object or a letter that represents a number of things.