Question

-X +6y= 14 5X + 3y= 29 resolva

Answer 1

- x + 6y = 14

5x + 3y = 29 (.-2) --- -10x - 6y = -58

-  x  + 6 y = 14
-10x - 6y = -58
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- 11x = - 44

x = - 44 / -11  (multiplica com -1)

x = 44/11 

x = 4

Se x = 4  substituindo fica:

- 4 + 6y = 14

6 y = 14 + 4

6 y = 18

y = 18/6

y = 3

Provando:  -4 + 6.3 = 14 -------  - (+4) + 18 = 14
                  5.(4) + 3.3 = 29----        20 + 9   = 29