Question

Развязать систему уравнения
Срочно!!!!!!

Answer 1

Answer:

x = 2.902

y = 3.627

Step-by-step explanation:

3(x-2y)+x(7-2y)=2y(1-x)

3x-6y + 7x-2xy = 2y-2xy

10x-6y -2xy = 2y-2xy

10x - 6y = 2y

10x = 8y

y = 10x/8 = 5x/4

4(x-y-1)+5(x+y-1)=31

4x-2y-1 + 5x+5y-5 = 31

9x-2y-1 + 5y-5 = 31

9x+3y-1-5 = 31

9x+3y-6 = 31

9x+3y = 37

y = 5x/4

9x+3y = 37

9x+3(5x/4) = 37

9x + 15x/4 = 37

51x/4 = 37

x = 148/51 = 2.902

9x+3y = 37

9(148/51) + 3y = 37

444/17 + 3y = 37

3y = 185/17

y = 185/51 = 3.627