If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable z is eliminated in the first and third equations, then the second and third equations.

x – y + 2z = –2
2x + 2y + z = 7
3x + 3y – z = 3

Question

If you were to use the elimination method to solve the following system, choose the new system of equations that would result after the variable z is eliminated in the first and third equations, then the second and third equations.

x – y + 2z = –2
2x + 2y + z = 7
3x + 3y – z = 3

anonymous · Answer

2x + 2y = 7
3x + 3y = 3

2x + 2y = 7
5x + 5y = 10

7x + 5y = 4
3x + 3y = 3

7x + 5y = 4
5x + 5y = 10

amorfide · Answer

does using matrices count as an elimination method?

campbell_st · Answer

the last pair or equations are correct

campbell_st · Answer

5x + 5y = 10 is equation (2) + equation (3)
7x + 5y = 4 is equation (1) + 2 x equation (2)

anonymous · Answer

thank you