44.4k views
13 votes
Solve by using Substitution: 3x-y=13 2x +2y = -10​

1 Answer

3 votes
3x-y=13
2x + 2y = -10

change 2x + 2y = -10 into slope intercept form, making the equation y = -x -5. insert y = -x - 5 into 3x - y = 13, making the new equation 3x + x - 5 = 13. Add alike terms together (3x + x = 4x) then add 5 to both sides, making the new equation 4x = 18. divide both sides by 4, making x = 6. Insert 6 back into the old equation of y = - x - 5, making the old equation y = - 6 - 5. Add alike terms (- 6 - 5 = - 11) making y = -11 and x = 6. (6, -11) would be the ordered pair.

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories