Question

(1/4)^(x-7)=2
помогите пожалуйста

Answer 1

${ frac{1}{4} }^{x - 7} = 2 \ {2}^{ - 2(x - 7)} = 2 \ - 2x + 14 = 1 \ - 2x = - 13 \ x = 6.5$