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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