algebra 1

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hi. i'm confused so please help. thanks.
9 - x/6 = 7(x+1)/13

multiple choice
a. 6
b. 13
c. 11
d. 12

thank you again.

  • algebra 1 -

    Multiply by the least common multiple, 78 will get rid of the fractions..
    9-13x=...

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