Question

x-7y=-11 ; 5x+2y=-18

Answer 1

Answer:

y = 1               x = -4

Step-by-step explanation:

x-7y=-11          equation  (1)

5x+2y=-18        equation  (2)

equation (2) * 7

35x - 14y = -126       equation  (3)

equation (1) * 2  

2x - 14 Y = -22         equation  (4)

equation (3) +equation  (4)

(35x - 14y  ) + (2x - 14 y )   = -126 - 22

(35 x+2 x) +(14 y -14 y) =  - 148

37x = -148

x = - 148/37

x= - 4

Substituting in equation  (1)

-4 - 7y  = - 11

- 7 y = -11+4

- 7 y = -7

y = 1.  

therefore

y = 1

x = -4

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