Solve: 7 ^(x+3) =519

1 answer

7 ^(x+3) =519
take logs of both sides

log 7^(x+3) = log 519
using rules of logs ...
(x+3)(log7) = log519
x+3 =log 519/log 7
x = log519/log7 - 3
= appr .2128

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