Respuestas

2012-05-22T00:31:52+02:00

a+b=32

a-b=6

 

b=32-a

a-(32-a)=6

 

a-32+a=6

2a-32=6

2a=6+32

a=38/2

a=19

 

19+b=32

b=32-19

b= 13

19+13=32

19-13=6

 

2012-05-22T00:45:20+02:00

a + b = 32

a - b = 6

 

sumamos

 

2a = 38

a = 19

b = 13