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6 February, 01:06

Joan had $147 to spend on eight books. After buying them she had $11. How much did each book cost?

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  1. 6 February, 01:32
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    Each book costs $17

    Step-by-step explanation:

    Step 1: Make an expression

    147 total - > 147 =

    8 books - > 8x

    11 left - > 11

    Expression: 147 = 8x + 11

    Step 2: Subtract both sides by 11

    147 - 11 = 8x + 11 - 11

    136 = 8x

    Step 3: Divide both sides by 8

    136 / 8 = 8x / 8

    17 = x

    Answer: Each book costs $17
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