If the sum of two numbers is 7x + 7 and one number is -5x + 2, what is the other number?

12x - 5

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12x + 5

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2x + 5

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2x – 5

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Solution

The correct option is B
12x + 5

(-5x+2) + = 7x+7

_ = (7x+7) - (-5x+2) = 12x +5

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