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3 years ago

7

2

alt=" 3^(x+7) = 9^(x-1)" align="absmiddle" class="latex-formula">

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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