Question

What would be the answer to this ?
Solve. 5x=15

Answer 1

Interpretation 1:

`5x = 15 \\`

Divide both sides by 5:

`\implies \boxed{x = 3}`

(Which is the final answer.)

`\huge\mathfrak\colorbox{white}{}`

Interpretation 2:

`5^(x)=15`

Take logarithm to the base 5 on both sides:

`\implies log_5(5^(x))=log_5(15)\\\implies x=log_5 (15) \\\implies x= (ln(15))/(ln(5)) \\\implies \boxed{x≈1.683}`

(Which is a thing too!)

`\huge\mathfrak\colorbox{white}{}`

P. S.: Now please don't tell me that this is a PhD level question and this is referring to the Knuth's Up-Arrow Notation. Which translates the question into something like:
`^(5)x=15`

Answer 2

x = 3

Explanation:

what would be the answer to this ?

Solve.

5x=15

x = 15 : 5

x = 3

--------------

check

5 * 3 = 15

the answer is good