Question

Please answer question 18
Show calculation please
Best answer gets brainliest

Answer 1

$10x + y = 7$
$10y + x = (10x + y) - 9$
$10y - y + x - 10x = - 9$
$9x - 9y = - 9$
$x - y = - 1$
$10x - 10y = - 10$
$10x + y = 7 - 10x - 10y = - 10$
$- 9y = - 3$
$y = - \frac{ - 3 }{ - 9}$
$y = \frac{1}{3}$
$put \: the \: value \: of \: y \: in \: any \: eq \: find \: x \: put \: i \: \: firt \: eq$