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Sea Betty: 3x
Ana : x
Carmen : 3x + 6
Entre las tres tienen $ 62
Por lo tanto:
3x + x + 3x + 6 = 62
7x = 62 - 6
x = 56/7
x = 8
Reemplazando en:
Sea Betty: 3x = 3 * 8 = $ 24
Ana : x = $ 8
Carmen : 3x + 6 = 3* 8 + 6= 24 + 6 = $ 30
sumando las tres cantidades $24 + $8 + $30 = $62