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1-28.

Solve each of the following equations.  

  1.  

    Isolate all 's on the same side.

    Isolate all constants on the same side.

    Divide by the coefficient of .

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    Notice that both fractions in this problem can be changed to exact decimal values.

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    .
    How can the fraction simplify to that?

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    Refer to the hint from part (b).