C = Claudio A = Alfredo
C = 4A
C + A + 17 = 42 C = 25 - A C = 4AC + A = 42 - 17 C + A = 25
igualamos la "C"
C =C
25 - A = 4A25 = 4A + A25 = 5A25 / 5 = A5 = A
C = 4 A C = 4(5) C = 20
Claudio tiene 20 años y Alfredo tiene 5 Años
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C = Claudio A = Alfredo
C = 4A
C + A + 17 = 42 C = 25 - A C = 4A
C + A = 42 - 17
C + A = 25
igualamos la "C"
C =C
25 - A = 4A
25 = 4A + A
25 = 5A
25 / 5 = A
5 = A
C = 4 A C = 4(5) C = 20
Claudio tiene 20 años y Alfredo tiene 5 Años