Given 3x+y=9 how do you solve for y? Algebra Expressions, Equations, and Functions Problem-Solving Models 1 Answer smendyka Dec 14, 2016 #y = 9 - 3x# Explanation: Subtract #3x# from each side of the equation to isolate #y# and keep the equation balanced: #3x - 3x + y = 9 - 3x# #(3x - 3x) + y = 9 - 3x# #0 + y = 9 - 3x# #y = 9 - 3x# Answer link Related questions What are the steps to solving a word problem? Where do I start when I'm trying to solve a word problem? How do you check a solution to a problem? What are the different strategies used to solve a word problem? What is the best method of determining the cost of downloading 26 movies, if it cost $2.25 to... How do you solve word problems involving percents? What are commonly used math terms that translates to addition, subtraction, multiplication, and division? How much pure antifreeze should be added to 3 gallons of a 30 percent antifreeze solution to get... How would you use equations to calculate the age of Al given that Al's father is 45 and he is 15... How do you solve #x=(y-1)/(y+1)# for y? See all questions in Problem-Solving Models Impact of this question 15256 views around the world You can reuse this answer Creative Commons License