What is x if #5x+4-8x=13#? Algebra Expressions, Equations, and Functions Variable Expressions 1 Answer Nam D. Jun 11, 2018 #x=-3# Explanation: Given: #5x+4-8x=13#. Add like-terms. #-3x+4=13# Subtract #4# from each side. #-3x=13-4# #=9# Divide by #-3#. #x=9/-3# #=-3# 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 1397 views around the world You can reuse this answer Creative Commons License