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9 August, 02:39

A student solved the equation 3 (2x-6) = 4x+8 and found the solution to be x=2.6. How could you use estimation and mental math to show that the students solution is incorrect?

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  1. 9 August, 04:39
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    2.6~ = 3

    0=20, impossible

    6x-18=4x+8

    2x=26

    x=13
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