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12 November, 18:44

A piece of timber is x cm long. 7 cm is cut off. How much is left?

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  1. 12 November, 22:09
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    x-7>0

    Straight answer: x-7

    Step-by-step explanation:

    Assuming that the timber is X cm long and 7cm was cut off, there remaining amount is x - 7cm. In order for 7cm to be cut off, the timber must have been > 7cm long = > x > 7 = > x - 7 > 0
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