Question

{4х-3у=10
{5х+3у=1

срочно​

Answer 1

Ответ:

$\displaystyle x =1 \frac{2}{9} \\y = -1\frac{19}{27}$

Объяснение:

$\displaystyle \left \{{4x-3y=10} \atop {5x+3y=1}} \right.$

$(4x - 3y) + (5x+3y)=10+ 1\\4x - 3y + 5x + 3y = 11\\9x + (3y-3y) = 11\\9x = 11 |:9\\x = 1 \frac{2}{9}$

$4x - 3y=10\\4 * 1\frac{2}{9} - 3y = 10\\4\frac{8}{9} - 3y=10\\-3y=10-4\frac{8}{9}\\ -3y=5\frac{1}{9}|:-3\\ u=-1\frac{19}{27}$