Question

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РЕШИТЕ СИСТЕМУ УРАВНЕНИЙ

5х - 3у =17
{
2х-8у=17

Answer 1

$left { {{5x-3y=17} atop {2x-8y=17}} right.$
$left { {{5x=17+3y} atop {2x=17+8y}} right.$
$left { {{10x=34+6y} atop {10x=85+40y}} right.$
$34+6y=85+40y$
$40y-6y=34-85$
$34y=-51$
$y= - frac{34}{51}$
$y= - frac{2}{3}$
5x-3y=17
$5x-3*(- frac{2}{3} )=17$
5x+2=17
5x=15
x=3