Question

(a) x-y=4 (b) 2x+y=7
x-3=0 3x-y=3

Answer 1

x - y = 4 ....  ( I )

x - 3 = 0

x = 3 .... ( II )

II en I

x - y = 4

3 - y = 4

3 - 4 = y

- 1 = y

CS = (-1; 3)

2x + y = 7    ... ( I )

3x - y = 3   ..... ( II )

'''''''''''''''''''''

5x  =  10

 x = 10/5

  x = 2 .... ( III )

III en I

2x + y = 7

2(2) +  y = 7

4 + y = 7

y = 7 - 4

y = 3

CS = (2; 3)

Eternamente axllxa