Question

verifiquese as retas r:3x+2y-7=0e s:2x+3y+2=0 sao concorrentes. em caso afirmativo

Answer 1

$y = - \frac{2}{3} x - \frac{2}{3}$
$y = - \frac{3}{2} x + \frac{7}{2}$
$- \frac{2}{3} x - \frac{2}{3} = - \frac{3}{2} x + \frac{7}{2}$
$- \frac{2}{3} x + \frac{3}{2} x = \frac{2}{3} + \frac{7}{2}$
$\frac{ - 4x + 9x}{6} = \frac{4 + 21}{6}$
$5x = 25 \\ x = 5$
São concorrentes em x = 5