1.(08.05) A student is trying to solve the system of two equations given below:
Equation P: y + z = 4
Equation Q: 3y + 7z = 15
Which of the following steps can be used to eliminate the y term? (4 points)
-3(y + z = 4)
3(y + z = 4)
-1(3y + 7 z = 15)
0 -3(3y + 72 = 15)