2. Решить уравнение a) 7a=41,6+3a; б) 7(x-5)+1=2-3(2x-1)

a) 7a - 3a = 41,6 => 4a = 41,6 => a = 10,4.
б) 7x - 35 + 1 = 2 - 6x + 3 => 7x - 34 = 5 - 6x => 7x + 6x = 5 + 34 => 13x = 39 => x = 3.