Consider the following system:
x+y-z=?,2 Equation 1
4x-2y-3z=?,-7 Equation 2
7x+y-7z=?,2 Equation 3
Eliminate y from Equations 1 and 2 by multiplying Equation 1 by _______ and Equation 2 by _______.
1) 2, 4
2) 3, 2
3) 4, 3
4) 5, 6