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Solve for X, 3^x + 3^2 = 90​
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5 votes
Solve for X, 3^x + 3^2 = 90​

User Toby Hede
by
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1 Answer

2 votes

3^x + 3^2 = 90

Simplify the known power:

3^x + 9 = 90

Subtract 9 from both sides:

3^x = 81

Take the cubic root of both sides:

X = 4

User Evenro
by
4.4k points
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