Question

eu IMPLORO, ngm responde minhas perguntas por favor me ajude.
SISTEMA DE EQUAÇÕES:​

Answer 1

$> resolucao \\ \\ \geqslant sistema \: de \: equacao \\ \\ 2d - 3e = 15 \\ 3d + e = 9 \times (3) \\ - - - - - - - - - \\ 2d - 3e = 15 \\ 9d + 3e = 27 \\ \\ 11d = 42 \\ d = \frac{42}{11} \\ \\ e = 9 - 3d \\ e = 9 - 3 \times \frac{42}{11} \\ e = 9 - \frac{126}{11} \\ e = - \frac{27}{11} \\ \\ \\ = = = = = = = = = = = = = = = = = = = = = \\ \\ \\ 3z + 2w = 7 \\ 2z - w = 12 \times \times (2) \\ - - - - - - - - - \\ 3z + 2w = 7 \\ 4z - 2w = 24 \\ \\ 7z = 31 \\ z = \frac{31}{7} \\ \\ - w = 12 - 2z \\ - w = 12 - 2. \frac{31}{7} \\ - w = 12 - \frac{62}{7} \\ - w = \frac{22}{7} \times ( - 1) \\ w = - \frac{22}{7} \\ \\ \\ = = = = = = = = = = = = = = = = = = = = = = = = \\ \\ \\ 5c + 2f = 24 \times (3) \\ 2c - 3f = 8 \times (2) \\ - - - - - - - - - \\ 15c + 6f = 72 \\ 4c - 6f = 16 \\ \\ 19c = 88 \\ c = \frac{88}{19} \\ \\ \\ 2f = 24 - 5c \\ 2f = 24 - 5. \frac{88}{19} \\ 2f = 24 - \frac{440}{19} \\ 2f = \frac{16}{19} \\ f = \frac{ \frac{16}{19} }{2} \\ f = \frac{16}{19} \times \frac{1}{2} \\ f = \frac{16}{38} \\ f = \frac{8}{19} \\ \\ \\ \\ > < > < > < > < > < > < > < > < > < > >$