Work Step by Step
Given that we know x=1 is part of the solution set, we back-substitute it into one of the initial equations: $x+y=5$ $1+y=5\quad/-1$ $y=4$ Confirm by substituting into the first equation: $-2(1)+5(4)=18$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.