|1 2|
|x 3|
det A = 3 - 2x
|1 0 1 1 0|
|2 1 x 2 1|
|3 -1 2 3 -1|
det B = 2-2-3+x = -3 + x
det A = det B
3 - 2x = -3 + x
-2x + x = -3 - 3
-x = -6
x = 6
Ola
x = 2
olhe o comentário de Gerson
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Verified answer
|1 2|
|x 3|
det A = 3 - 2x
|1 0 1 1 0|
|2 1 x 2 1|
|3 -1 2 3 -1|
det B = 2-2-3+x = -3 + x
det A = det B
3 - 2x = -3 + x
-2x + x = -3 - 3
-x = -6
x = 6
Ola
x = 2
olhe o comentário de Gerson