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Solving a system of four equations


Problems:

Solving a System of Four Equations

1. Solve this system of equations. Put your answer in alphabetical order.
                       5w+3x-y-z=-2
                         w+x+y+z=2
                       2W-x+y+4z=0
                       3w+2x+3y+2z=1

2. If x varies directly as 2y-1, and x=9 when y=2, find the value of y when x has a value of 15.

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Algebra: Solving a system of four equations
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