ОДЗ : x-2 >0 => x>2
Найдем нули модулей :
|x-7| = 0
x = 7
x<7 x≥7</p>
-----------------7-------------------
1. x < 7:
x-7 ≠ 0, так как x < 7
2. x ≥ 7 :
x-2 = 2^{3} =>x-2=8=>x=10" alt="(x-7)*log2(x-2) - 3(x-7) =0\\(x-7)(log2(x-2)-3) = 0\\x = 7\\log2(x-2) = 3 => x-2 = 2^{3} =>x-2=8=>x=10" align="absmiddle" class="latex-formula">
Корни : 17/18 , 7 , 10
Сумма = 10+7+17/8 = 17+17/8 = 153/8 = 19.125
Ответ: 19.125