Question #77dfc Algebra Systems of Equations and Inequalities Systems Using Substitution 1 Answer hassan j. · Stefan V. Jan 9, 2018 #x=5# #y=40# Explanation: We know both equations are equal to #y# right, so we will set both equations equal to each other. #y=y# So #8x=5x+15# #8x-5x=15# #3x=15# #x=15/3# #x=5# And since #y = 8x# you have #y = 8 * 5 = 40# There you have it. 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 1078 views around the world You can reuse this answer Creative Commons License