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algebra real world problm solving

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You want to buy a cd plaer that cost $99. you already have $15.00. If you save $12 per week, when will you have enough money to buy the cd player?
i need to write an expression and solve it.
i wrote: x/12 - $15 = $99
im not sure how to do this?

  • algebra real world problm solving -

    wait: igot this instead:

    12 (x) +15 = $99
    12(7) + 15 = $99
    84 + 25 = $99

  • algebra real world problm solving -

    12x = 99 - 15

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