A student is trying to solve the system of two equations given below: Equation P: y + z = 6 Equation Q: 5y + 9z = 1 Which of the following is a possible step used in eliminating the y-term?
(y + z = 6) ⋅ 9
(y + z = 6) ⋅ −5 (
5y + 9z = 1) ⋅ 9
(5y + 9z = 1) ⋅ 5
