Mathematics, 12.11.2020 02:10, cearacrank

Solve the system of equations: x + y + z = 5; x - y + 3z = 9; and z = 6.
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Solve the system of equations: x + y + z = 5; x - y + 3z = 9; and z = 6.
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Solve the system of equations: x + y + z = 5; x - y + 3z = 9; and z = 6. PLS PLS HELP ME

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Solve the system of equations: x + y + z = 5; x - y + 3z = 9; and z = 6.
PLS PLS HELP ME