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7 August, 00:30

A student says that if 5x2 = 20, then x must be equal to 2. do you agree or disagree with the student? justify your answer.

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  1. 7 August, 03:14
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    I disagree. If each side of the equation is divided by 5, the result is x2 = 4. By the square root property of equality, x = - 2 or x = 2. So x could be - 2 instead of 2.
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