Question

a) 6x-7y =17 b) 5x-6y=19 c) 6x+y =44
8x-7y=25 2x-8y=2 2x-7y=0

ayudenme a resolver estos 3 ejercicios pliss

Answer 1

Respuesta:

a)6x - 7y = 17   (+)

  8x - 7y = 25

14x = 42

x = 3

6(3) - 7y = 17

18  - 7y = 17

7y =1

y = 1/7

b) 5x - 6y = 19

   2x - 8y = 2

  3x + 2y = 21

 2y = 21-3x

5x - 63 + 9x = 19

14x = 82

x = 41/7

c) 6x + y = 44

2x - 7y = 0

y = 44 - 6x  = 44 - 42 = 2

2x - 308 + 42x = 0

44x = 308

x = 7

Ojala te ayude ;)

Coronita?