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?
A) - 3 (y + z = 4)
B) 3 (y + z = 4)
C) - 1 (3y + 7z = 15)
D) - 3 (3y + 7z = 15)
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