Question

Срочно
(3.7)^х=12-4b
b-?

Answer 1

$3.7 {}^{x} = 12 - 4b \\ \\ ( \frac{37}{10} ) {}^{x} = 12 - 4b \\ \\ \frac{3 {7}^{x} }{ {10}^{x} } = 12 - 4b \\ \\ 4b = 12 - \frac{ {37}^{x} }{ {10}^{x} } \\ \\ b = 3 - \frac{ {37}^{x} }{4 \times 10 {}^{x} }$