What is the answer to 3^x=21 ?

The answer to 3^x=21 is x=(ln(21))/(ln(3))

The solution is x=(ln(21))/(ln(3))

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

3^x=21

3^{x} = 21

x = \frac{ln ( 21 )}{ln ( 3 )}

Decimal Notation

x = 2.77124 \dots

Solution steps

3^{x} = 21

Apply exponent rules

x ln (3) = ln (21)

Solve

x ln (3) = ln (21) : x = \frac{ln ( 21 )}{ln ( 3 )}

x = \frac{ln ( 21 )}{ln ( 3 )}

7^{x + 6} = 7^{3 x - 4}

16 = 2^{x}

1 = 3 (2^{x})

2^{3 x + 4} = 18

4^{x^{2} - 6} - 1 6^{x + 1} = 0