solve following linear equations by using cramers rule 2x-y+z=1
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Answer:
Δ=
∣
∣
∣
∣
∣
∣
∣
∣
2
1
1
−1
1
−1
3
1
1
∣
∣
∣
∣
∣
∣
∣
∣
=2(1+1)−(−1)(1−1)+3(−2)=4−6=−2
Now, Δ
x
=
∣
∣
∣
∣
∣
∣
∣
∣
9
6
2
−1
1
−1
3
1
1
∣
∣
∣
∣
∣
∣
∣
∣
=14
Δ
y
=
∣
∣
∣
∣
∣
∣
∣
∣
2
1
1
9
6
2
3
1
1
∣
∣
∣
∣
∣
∣
∣
∣
=−2
Δ
z
=
∣
∣
∣
∣
∣
∣
∣
∣
2
1
1
−1
1
−1
9
6
2
∣
∣
∣
∣
∣
∣
∣
∣
=−6
Step-by-step explanation:
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