Respuesta:
I don't know, you must know smart
20
Explicación paso a paso:
Cx + C2x = 120
90 - x + (90- 2x ) = 120
90 - x + 90 - 2x = 120
180 - 3x = 120
60 = 3x
20 = x
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Respuesta:
I don't know, you must know smart
Verified answer
Respuesta:
20
Explicación paso a paso:
Cx + C2x = 120
90 - x + (90- 2x ) = 120
90 - x + 90 - 2x = 120
180 - 3x = 120
60 = 3x
20 = x