Найдите два каких -либо решения уравнения :х

snezhanabalaxo @snezhanabalaxo

July 2022 1 5 Report

Найдите два каких -либо решения уравнения :х - у = 5 ; 5х + у = 9

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egorkaaa

Verified answer

$\left \{ {{x-y=5} \atop {5x+y=9}} \right.$
$\left \{ {{y=x-5} \atop 5x+(x-5)=9}} \right.$
5x+(x-5)=9
5x+x=9+5
6x=14
$x= \frac{14}{6} = \frac{7}{3} = 2\frac{1}{3}$
$y= 2\frac{1}{3}-5=-(5- 2\frac{1}{3})=- 2\frac{2}{3}$

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