Llena los espacios que faltan de la ecuación
x+ x + 20 + x = 240
_____ X = 240
x = 240/_____
x=_____
x+ x + 20 + x = 240
_____ X = 240
x = 240/_____
x=_____
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Respuesta:
x+x+20+x=240
20+3x=240
x=240/3
x=80