Реш уравнение 12(х-1 3/10 *5/6)=0
12(х-1 3/10 *5/6)=0 1 3/10 = 13/10 12x - 156/10 × 60/6 = 0 12x - 15,6 × 10=0 12x - 156 = 0 x = 156 ÷ 12 x = 13