3. Решите уравнение: а)7 – 4 (3x - 1) = 5 (1-2x), б) 5x² – 2x=0.

а) 7 – 4(3x - 1) = 5(1 - 2x) 7 - 12x + 4 = 5 - 10x 11 - 12x = 5 - 10x -12x + 10x = 5 - 11 -2x = -6 x = -6 / -2 x = 3 б) 5x² – 2x = 0 x(5x - 2) = 0 x₁ = 0 5x - 2 = 0 5x = 2 x₂ = 2/5 = 0.4 Ответ: а) x = 3 б) x₁ = 0, x₂ = 0.4