Question

hallar "x+y" al resolver:
4x - 3y = a+3
12x + 7y = 19a - 7
ayuden porfa

Answer 1

Respuesta:

7{4x - 3y = a + 3

3{12x + 7y = 19a- 7

28x - 21y = 7a - 21

36x + 21y = 57a +21

64x = 64a

x/a = 64/64

entonces a = 64 y x = 64

ahora

4x - 3y = a + 3

4(64) - 3y = 64 + 3

256 - 3y = 67

- 3y = 67- 256

-3y = -189

y = -189/3

y = 63