Whats the the algebraic expression for "A number added to three is equal to nine "? Algebra Expressions, Equations, and Functions Variable Expressions 1 Answer Johnson Z. Dec 20, 2015 #3+x=9# Explanation: Let #x# be a number. Final answer: #3+x=9# Answer link Related questions How do you write the variable expression for: a quotient of 2 and the sum of a number and 3 ? What are variables? What are variable expressions? How do you write variable expressions? How do you evaluate variable expressions? How do you simplify the expression #3x-x+4#? How do you write a quotient of a number and 6 as an expression? How do you evaluate the expression #2x+1# for #x=1#? How do you write a product of a number and 2 as an expression? How do you write 5 less than 2 times a number as a variable expression? See all questions in Variable Expressions Impact of this question 2699 views around the world You can reuse this answer Creative Commons License