Question

Решите систему уравнений :

{3х - 2у = - 12.
{5х + 4у = - 4.

Answer 1

3х - 2y = - 12 ( • 2 )
6x - 4y = - 24
5x + 4y = - 4
11x = - 28
X = - 28/11 = - 2 ( 6/11)
5•( - 28/11 ) + 4y = - 4
4y = - 4 + ( 140/11 ) = - 4 + 12 ( 8/11 ) = 8 ( 8/11 )
Ответ ( - 2 6/11 ; 8 8/11 )

Answer 2

Благодарю.