Respuesta:
Alberto = a
Benjamin = 3a
Carlota = 2(3a) = 6a
[tex]a \: + 3a \: + 2(3a) = 20 \\ 4a + 6a = 20 \\ 10a = 20 \\ a = \frac{20}{10} \\ a = 2[/tex]
Alberto izo 2 sandwiches
Es la a) 2
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Respuesta:
Alberto = a
Benjamin = 3a
Carlota = 2(3a) = 6a
[tex]a \: + 3a \: + 2(3a) = 20 \\ 4a + 6a = 20 \\ 10a = 20 \\ a = \frac{20}{10} \\ a = 2[/tex]
Alberto izo 2 sandwiches
Es la a) 2