How do you solve y=3x-4 and 2x-3y=-9? Algebra Systems of Equations and Inequalities Systems Using Substitution 1 Answer James W. Jun 22, 2018 x=3 y=5 Explanation: Let 3y = 3(3x-4), 2x - 3(3x-4)=-9 2x-9x+12=-9 -7x=-21 x=3 y=5 Answer link Related questions How do you solve systems of equations using the substitution method? How do you check your solutions to a systems of equations using the substitution method? When is the substitution method easier to use? How do you know if a solution is "no solution" or "infinite" when using the substitution method? How do you solve y=-6x-3 and y=3 using the substitution method? How do you solve 12y-3x=-1 and x-4y=1 using the substitution method? Which method do you use to solve the system of equations y=1/4x-14 and y=19/8x+7? What are the 2 numbers if the sum is 70 and they differ by 11? How do you solve x+y=5 and 3x+y=15 using the substitution method? What is the point of intersection of the lines x+2y=4 and -x-3y=-7? See all questions in Systems Using Substitution Impact of this question 1761 views around the world You can reuse this answer Creative Commons License