Respuesta:
40
Explicación paso a paso:
10+x+x+30+x+20 = 180
3x+60 = 180
3x = 180-60
3x = 120
x = 120/3
x = 40
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Respuesta:
40
Explicación paso a paso:
10+x+x+30+x+20 = 180
3x+60 = 180
3x = 180-60
3x = 120
x = 120/3
x = 40