3. Решите уравнение: 1) $$-6(x + 2) = 4x - 17$$; 3) $$10x + 3(7 - 2x) = 13 + 2x$$;

1) $$-6(x + 2) = 4x - 17$$ $$-6x - 12 = 4x - 17$$ $$-6x - 4x = -17 + 12$$ $$-10x = -5$$ $$x = \frac{-5}{-10}$$ $$x = \frac{1}{2} = 0.5$$ 3) $$10x + 3(7 - 2x) = 13 + 2x$$ $$10x + 21 - 6x = 13 + 2x$$ $$4x + 21 = 13 + 2x$$ $$4x - 2x = 13 - 21$$ $$2x = -8$$ $$x = \frac{-8}{2}$$ $$x = -4$$