Question

Solo matematicos (no se necesita procedimiento)

Answer 1

Hola (｡•̀ᴗ-)✧

Respuesta:

11

Explicación paso a paso:

(3a -b ; 28) = (5 ; 7a)

7a = 28

a = 28/7

a = 4

3a - b = 5

3(4)-b = 5

12-b = 5

-b = 5-12

-b = -7

b = 7

a+b = 4+7 = 11