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One number is 12 more than another. The sum of the smaller number and twice the larger number is 39. Find the larger number.

a) 5
b) 7
c) 17
d) 34

  • algebra -

    If a is large and b is small:

    First rule: a = 12 + b
    Second rule: b + 2a = 39

    Solve those two equations for a. The answer is choice "c"

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