Найти x : (1 7/10:(23-х) )*21 1/4=2 5/6

Находим неизвестное значение х.(1 7/10:(23-х) )*21 1/4=2 5/6.(17/10 ÷ (23 - х) × 85/4 = 17/6.17/10 ÷ (23 - х) = 17/6 ÷ 85/4.17/10 ÷ (23 - х) = 17/6 × 4/85.17/10 ÷ (23 - х) = 1/3 × 2/5.17/10 ÷ (23 - х) = 2/15.23 - х = 17/10 ÷ 2/15.23 - х = 17/10 × 15/2.23 - х = 17/2 × 3/2.23 - х = 51/4.- х = 51/4 - 23.- х = 51/4 - 92/4.- х = (51 - 92)/4.- х = - 41/4.х = 10 1/4.