Question

Como resolver a equação
3×+7y=5y=2

Answer 1

Resposta:

$y = \frac{2}{5}\\\\\3x + 7 . (\frac{2}{5}) = 5 . (\frac{2}{5})\\\\\3x + \frac{14}{5} = 5 . (\frac{2}{5}) \\\\\3x + \frac{14}{5} = 2\\\\3x = 2 - \frac{14}{5}\\\\\3x = - \frac{4}{5} (:3)\\\\\x = \frac{-\frac{4}{5} }{3}\\\\\x = \frac{-4}{5.3} \\\\\x = \frac{-4}{15}\\\\\ x = -\frac{4}{15} \ e \ y = \frac{2}{5}$