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Rodrigo
2:) classifique os sistemas a seguir:
a) { x - 3y = 2 { x + 2y = 3
b) { x + y + z = 0 { x + 3y - 2z = 0 { x + 2y - 3z = 5
c) { 2x + y + z = 3 { 2x + y + 2z = 5 { 3x + 2y + 2z = 5
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