Question

What is the solution to the equation 14 x + 3 = 21?

x ≈ −2.133
x ≈ −1.846
x ≈ 3.867
x ≈ 4.154

Answer 1

@jim_thompson5910

Answer 2

let me guess \[14^{x+3}=21\] right?

Answer 3

yes @satellite73 sorry cx

Answer 4

\[14^{x+3}=21\iff x+3=\frac{\log(21)}{\log(14)}\]

Answer 5

that is the change of base formula
you still have to solve for \(x\) so \[x=\frac{\log(21)}{\log(14)}-3\] and a calculator

Answer 6

so the answer is B .. Thank you.

Answer 7

want me to check?

Answer 8

yeah you got it B

Answer 9

:)