(m+4/15)-2/15=0,8 найдите корень уравнения

(m+4/15)-2/15=0,8m + 4/15 = 0,8 + 2/15m + 4/15 = 8/10 + 2/15m + 4/15 = 4/5 + 2/15m + 4/15 = 12/15 + 2/15m + 4/15 = 14/15m = 14/15 - 4/15m = 10/15m = 2/3