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8 July, 14:25

A+b+c=18, b+c=10, c-b=6

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  1. 8 July, 18:10
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    C-b=6

    solve for c

    c=b+6

    substitute b+6 for c

    b+c=10

    b + (b+6) = 10

    2b=4

    b=2

    substitute that in to find C

    c-b=6

    c-2=6

    c=8

    a+b+c=18

    a+2+8=18

    a+10=18

    a=8

    so a=8, b=2, c=8
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