Question

C - 2D = -5
2C + 3D = 11

alguém sabe a resposta?
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Answer 1

$> resolucao \\ \\ \geqslant sistema \: de \: equacao \\ \\ c - 2d = - 5 \times ( - 2) \\ 2c + 3d = 11 \\ - - - - - - - - - - \\ \\ - 2c + 4d = 10 \\ 2c + 3d = 11 \\ \\ 7d = 21 \\ d = \frac{21}{7} \\ d = 3 \\ \\ c = - 5 + 2d \\ c = - 5 + 6 \\ c = 1 \\ \\ \\ \\ s \: > \: \: ( \: \: c = 1 \: \: e \: \: d = 3 \: \: ) \\ \\ \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant \leqslant \geqslant$