Question

решить систему уравнения.срочно надо​

Answer 1

3x - 5y = 17

3x + 5y = 7

6x = 24

3x + 5y = 7

x = 4

3x + 5y = 7

x = 4

3 * 4 + 5y = 7

x= 4

12 + 5y = 7

x= 4

5y = 7 - 12

x= 4

5y = -5

x= 4

y = -1

(4 ; -1)

x + y = 7 | • 7

5x - 7y = 11

7x + 7y = 49

5x - 7y = 11

12x = 60

x + y = 7

x = 5

x + y = 7

x = 5

5 + y = 7

x = 5

y = 7 - 5

x = 5

y = 2

(5 ; 2)