Решите систему уравнений 5x-2y=114x-y=4

Question

Решите систему уравнений
5x-2y=11
4x-y=4

Answer 1

{5x-2y=11; 4x-y=4;
{5x-2y=11; 4x=4+y
{5x-2y=11; x=(4+y)/4
(5(4+y))/4-2y=11
20-3y=44
-3y=24
y=-8
{y =-8; 5x-2*(-8)=11;
{y=-8; x=-1

Answer 2

5x-2y=11 {4x-y=4 5x-2y=11 y=4x-4 5x-2(4x-4)=11 5x-8x+8=11 -3x+3 X=-1 y=-4-4=-8