Question

resolver por metodo de sustitucion 6x-3y=7 8x-5y=10

Answer 1

$6x - 3y = 7 \\ 8x - 5y = 10$

$x = \frac{7}{6} + \frac{1}{2} y$

$8( \frac{7}{6} + \frac{1}{2} y) - 5y = 10$

$\frac{28}{3} + 4y - 5y = 10$

$4y - 5y = \frac{30}{3} - \frac{28}{3}$

$- y = \frac{2}{3}$

$y = \frac{2}{3} \div - 1$

$y = - \frac{2}{3}$