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Debes emplear la opción c así:
2(2) + 5(-1) +2(3) = 5
4 - 5 +6 = 5
5 =5
2)3x -2y -3z = -1
Debes emplear la opción 3 así:
3(2) - 2(-1) - 3(3) =- 1
6 + 2 -9 =- 1
8 - 9 = - 1
- 1 = - 1
3) 2x + 3y + 3z = 10
Debes escoger la opción c y aplicarla así:
2(2) + 3(-1) + 3 (3) 0 10
4 -3 + 9 = 10
10 = 10