Question

dados los pares ordenados:
(3a + 2b; 27) = (5; 7a - 3b)
hallar: 5a + 8b

Answer 1

Respuesta:

3×(3a + 2b) = (5)3

2×(7a - 3b) = (27)2

9a + 6b = 15

14a - 6b = 54

Sumamos

23a = 69

a = 3

Entonces

3(3) + 2b = 5

9 + 2b = 5

2b = - 4

b = - 2

5a + 8b = 5(3) + 8(-2)

15 - 16 = -1