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9 January, 16:59

3r+6-r+2=3r-r+6+2=3+6+2=11

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  1. 9 January, 17:04
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    Move everything to the same side to make the equation equal zero

    3r+6-r+2-3r+r-6-2-3-6-2-11=0

    Collect like terms.

    3r-r-3r+r+6+2-6-2-3-6-2-11=0

    Solve

    3r-r-3r+r=0

    R=0, so just add the other numbers for the solution

    6+2-6-2-3-6-2-11=-22
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