math

Kevin and Zach are playing a number guessing game. Kevin says, "I am thinking of a number. If you double it and then subtract one, the result is 7."
a) Write an equation that Zach could solve to find Kevin's number.
b) Explain the steps Zach could use to solve the equation.

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asked by sam
  1. a)n=(7+1)/2
    b)it is easy now

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    posted by Busy 6
  2. Let the number be called x

    a) 2x -1 = 7

    b) Try solving for x yourself. It isn't hard. It takes two steps

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    posted by drwls
  3. thanks:D

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    posted by sam

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