Question

СРОЧНО❗даю 30 баллов ​

Answer 1

Ответ:

:)

Пошаговое объяснение:

2x+5y = -7                                

3x-y = 15;                        

2x+5y = -7

y = -15 +3x;

2x+5*(-15+3x) = -7;

x = 4;

y = -15 + 3*4 = -3;

(x,y) = (4, -3)

2x-3y = 5

x-6y = -2;

2x-3y = 5

x = -2 +6y;

2*(-2+6y)-3y = 5;

y = 1

x = -2+6*1;

x = 4

(x,y) = (4,1)

5x-4y = 12

x-5y = -6;

5x-4y = 12

x = -6 +5y

5*(-6y+5y)-4y = 12;

y = 2

x = -6 + 5*2;

x = 4

(x,y) = (4,2)