Question

9а + 16b = 7
-За + 4b = 0
método de igualacion, con procedimiento porfa​

Answer 1

Respuesta:

9а + 16b = 7

-За + 4b = 0

9a + 16b = 7

12a - 16b = 0

21a = 7

a = 7/21

a = 1/3

reemplazas en "a"

9a + 16b = 7

9(1/3) + 16b = 7

9/3 + 16b = 7

3 + 16b = 7

16b = 7 - 3

16b = 4

b = 4/16

b = 1/4

comprobación

9a + 16b = 7

9(1/3) +16(1/4) = 7

9/3 + 16/4 = 7

3 + 4 =  7

7 = 7

12a - 16b = 0

12(1/3) - 16(1/4) = 0

12/3 - 16/4 = 0

4 - 4 = 0

0 = 0

Explicación paso a paso: