Respuesta:
x = 15
Explicación paso a paso:
70 + 65 + 3x = 180
135 + 3x = 180
3x = 180 - 135
x = 45/3
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Respuesta:
x = 15
Explicación paso a paso:
70 + 65 + 3x = 180
135 + 3x = 180
3x = 180 - 135
x = 45/3
x = 15