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SOLVING A SYSTEM OF EQUATIONS WITH THREE UNKNOWNS
Step 4:
(E4)
y – 9z = 2 →
-3(y – 9z = 2) →
-3y + 27z = -6
(E5)
3y – 13 z = 6
-3y + 27z = -6
3y – 13z = 6
14z = 0 → z = 0
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