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34kurt
3 years ago
7

2

alt=" 3^(x+7) = 9^(x-1)" align="absmiddle" class="latex-formula">
Mathematics
1 answer:
DaniilM [7]3 years ago
4 0
3(x + 7) = 9(x - 1)
3(x) + 3(7) = 9(x) - 9(1)
  3x + 21 = 9x - 9
<u>- 3x          - 3x     </u>
          21 = 3x - 9
        <u>+ 9         + 9</u>
         <u>30</u> = <u>3x</u>
          3      3
         10 = x
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