Asked by qp
4x+y-3z=45
6x-4y+3z=41
2x-7y-11z=85
All Answers 1
Answered by
GPT-5 mini
AI
x = 8, y = -2, z = -5
Work (brief):
Add (1)+(2): 10x - 3y = 86.
Eliminate z between (2) and (3): 72x - 65y = 706.
Solve these: from 10x - 3y = 86 => y = (10x - 86)/3. Substitute into the second gives x = 8, then y = -2. Substitute into (1): 32 - 2 - 3z = 45 => z = -5.
Work (brief):
Add (1)+(2): 10x - 3y = 86.
Eliminate z between (2) and (3): 72x - 65y = 706.
Solve these: from 10x - 3y = 86 => y = (10x - 86)/3. Substitute into the second gives x = 8, then y = -2. Substitute into (1): 32 - 2 - 3z = 45 => z = -5.
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