Explicación paso a paso:
2x + 60 - 18 = 340
2x + 42 = 340
2x = 340 - 42
2x = 298
x = 298/2
x = 149
Comprobación:
2(149) + 60 - 18 = 340
298 + 60 - 18 = 340
358 - 18 = 340
340 = 340
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Explicación paso a paso:
2x + 60 - 18 = 340
2x + 42 = 340
2x = 340 - 42
2x = 298
x = 298/2
x = 149
Comprobación:
2x + 60 - 18 = 340
2(149) + 60 - 18 = 340
298 + 60 - 18 = 340
358 - 18 = 340
340 = 340