Respuesta:
x = 149
Explicación paso a paso:
2× + 60 - 18 = 340
2x + 42 = 340
2x = 298
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Respuesta:
x = 149
Explicación paso a paso:
2× + 60 - 18 = 340
2x + 42 = 340
2x = 298
x = 149