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The value of 21 - 18 is 3. 9 - {x - (7 + x)} 9 - {x - 7 - x} 9 - x + 7 + x 9 + 7 - x + x 16

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(1) Answers

The value of 21 - 18 is 3. 9 - {x - (7 + x)} 9 - {x - 7 - x} 9 - x + 7 + x 9 + 7 - x + x 16

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