Question

| 5x - 3y =11
|
《
| 3x + y =1
|
Решите систему уранений , сроооочноооо!!!!!!

Answer 1

$\left \{ {{5x-3y=11} \atop {3x+y=1}} \right. \left \{ {{5x-3y=11} \atop {y=1-3x}} \right. \\ 5x-3(1-3x)=11 \\5x-3+9x=11 \\14x-3=11 \\14x=11+3 \\14x=14 \\x=1 \\\ y=1-3*1 \\y=1-3 \\y=-2 \\(x,y)=(1,-2)$
 Проверка:
$\left \{ {{5*1-3*(-2)=11} \atop {3*1-2=1}} \right.\\ \\ \left \{ {{11=11} \atop {1=1}} \right.$