7 times a number increased by 4 times the number Let a number and the number be an arbitrary variable. Let's call it x. We have an algebraic expression. Let's take it in pieces: 7 times a number: 7x 4 times the number: 4x The phrase increased by means we add 4x to 7x: 7x + 4x Simplifying, we get: (7 + 4)x 11x