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Mario earned three times as much money last year as his wife Elena. The total amount that the two earned was $11,000. How much money did Elena earn?

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Respuesta :

alexebenjamin
3x+x=11000
4x=11000
/4        /4
x=2750

where x is elena's money, mario earned 3 times as much as her (3x) and together they made 11000 ( +x)  which is how I derived this equation 

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