1.) A number minus 18 2.) A number decreased by 16 3.) \( x \) plus twelve is twenty one 4.) \( x \) times twelve is forty-six 5.) six increased by twelvelve times a number decreased by twelve \( =4 n-12 \) 6.) two times eight and re-write them into an algebraic expression: 7.) six more than twice a number 8.) eight divided by twice a number 10.) \( x \) times eleven is equal to thirty-three of seven and \( x \) 11.) The difference between \( x \) and eight is equal to fifteen. 12.) A number plus ten 13.) The quotient of \( x \) and four is thirteen 15.) The product of a number and 1hirfeen.

Did you know that algebra has its roots in ancient civilizations? The term "algebra" comes from the Arabic word "al-jabr," which was introduced in the 9th century by mathematician Al-Khwarizmi. He wrote a book that systematically solved linear equations, revolutionizing how we think about mathematical problems today! In real life, we often use algebra to budget our expenses or plan our savings! For example, if you want to save a specific amount of money over a certain number of months, you can set up an equation to figure out how much to save each month. This practical application makes math not just numbers on a page, but a useful tool in everyday life!