Easy Problem 79D

Algebra Level 1

3 x + 3 = 12 \large { 3 }^{ x }+3=12

Find x x .


The answer is 2.

Benjamin Holck by Benjamin Holck , 18, Denmark

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2 solutions

X X
Aug 30, 2018

3 x + 3 = 12 ; 3 x = 9 ; x = 2 3^x+3=12;3^x=9;x=2

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You should use semicolon if you are presenting it in this way instead of comma

Mohammad Farhat - 2 years, 9 months ago

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Okay, edited.

X X - 2 years, 9 months ago
Mohammad Farhat
Aug 30, 2018

If 3 x + 3 = 12 3^x + 3 = 12 then we subtract 3 from each side and get 3 x 3^x =9 and the square root of 9 makes 3 2 3^2 and 2 = x 2=x

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x = 2 x=2 , not 3 3 ...

X X - 2 years, 9 months ago

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Sorry... Can you forgive me

Mohammad Farhat - 2 years, 9 months ago

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It's okay...

X X - 2 years, 9 months ago

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@X X – thank you ….

Mohammad Farhat - 2 years, 9 months ago

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