Question
On Thursday, Esther, Lucy, Tiffany and Risa spent a total of $139. On Friday, Esther spent twice of what she spent on Thursday, Lucy spent the same as what she spent on Thursday, Tiffany spent $12 less than what she spent on Thursday, and Risa spent $6 more than what she spent on Thursday. All of them spent an equal amount on Friday. How much did Esther and Risa spend altogether on Thursday?
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On Thursday, Esther, Lucy, Tiffany and Risa spent a total of $139. On Friday, Esther spent twice of what she spent on Thursday, Lucy spent the same as what she spent on Thursday, Tiffany spent $12 less than what she spent on Thursday, and Risa spent $6 more than what she spent on Thursday. All of them spent an equal amount on Friday. How much did Esther and Risa spend altogether on Thursday?