Name:___________________________ Period:_______Date:_______________ Solving Systems of Equations by Linear Combination Answers
Section I. Solve the system of linear equations by using linear combination 1. 2! + 3! = 5 3! + 2! = 0 −2, 3 3. 2! − 3! = −1 −4! + ! = 7 −2, −1 5. 4! − 2! = 8 2! − ! = 4 infinite solutions 7. 4! + 3! = 1 ! − 4! = −14 −2, 3 2. −3! + 2! = −10 3! + 5! = −4 4. 2! + ! = 7 ! − 2! = 1 6. 4! − 2! = 24 2! − ! = 17 8. 2! + 5! = 7 −4! − 10! = 2 2, −2 3, 1 no solutions no solutions 9. ! = −3 2! − 5! = −11 −3, 1 11. 3! + 4! = 20 7! − 2! = −10 0, 5 13. 8! + 3! = −27 −6! + 9! = 9 −3, −1 15. 2! − ! = 8 ! + ! = −4 !
!
1 ! , −5 ! 10. 2! + 4! = 18 3! − 6! = 3 12. ! ! + 2! = 5 2! − ! = 6 14. 4! + 3! = 1 −2! + 9! = −4 16. 3! + 7! = −8 5! + 8! = −6 5, 2 !
4, 2 !
!
!
, − ! 2, −2