Вопрос в картинках...

Question

Решите задачу:

Answer 1

Log25_(x+5) = log1/5_2;
log5^2_(x+5) = log5^-1_2;
1/2  * log5_(x+5) = - log5_2;
1/2 * log5_(x+5) = log5_(1/2);     /*2;
log5_(x+5) = log5_(1/4);
x+5 = 1/4;
x = 0,25 - 5;
 x = - 4,75