Question

решите уравнение y-49y=4.5

Answer 1

$y-frac{4}{9} y=4,5,$
$y- frac{4}{9} y= frac{45}{10} ,$
$y- frac{4}{9} y= frac{9}{2} ,$
$18y-18* frac{4}{9} y=18* frac{9}{2} ,$
$18y-2*4y=9*9,$
$18y-8y=81,$
$10y=81,$
$y=81:10,$
$y=8,1$
Ответ: 8,1.