I set this problem up as 500-2X=3,400
Marys monthly salary is $500 less than twice her daughter's salary. Together they earn $3,400 each month. How much is the daughter's salary. ans-1,300
what am I missing

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  1. You're close, here's what you could have done:

    daughter's salary = X
    Mary's salary = 2X-500

    Together, they earn
    2X-500 + X = 3400
    3x = 3400 +500 = 3900

    Can you take it from here?

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