5. Решите уравнение: 1) -6(x + 2) = 4x − 17; 2) (18x − 19) − (4 − 7x) = -73; 3) 10x + 3(7- 2x) = 13 + 2x; 4) -3(4-5y) + 2(3 - 6y) = -39.

Решим уравнения: 1) $$-6(x + 2) = 4x - 17$$ $$-6x - 12 = 4x - 17$$ $$-6x - 4x = -17 + 12$$ $$-10x = -5$$ $$x = \frac{-5}{-10}$$ $$x = 0.5$$ Ответ: x = 0.5 2) $$(18x - 19) - (4 - 7x) = -73$$ $$18x - 19 - 4 + 7x = -73$$ $$25x - 23 = -73$$ $$25x = -73 + 23$$ $$25x = -50$$ $$x = \frac{-50}{25}$$ $$x = -2$$ Ответ: x = -2 3) $$10x + 3(7 - 2x) = 13 + 2x$$ $$10x + 21 - 6x = 13 + 2x$$ $$4x + 21 = 13 + 2x$$ $$4x - 2x = 13 - 21$$ $$2x = -8$$ $$x = \frac{-8}{2}$$ $$x = -4$$ Ответ: x = -4 4) $$-3(4 - 5y) + 2(3 - 6y) = -39$$ $$-12 + 15y + 6 - 12y = -39$$ $$3y - 6 = -39$$ $$3y = -39 + 6$$ $$3y = -33$$ $$y = \frac{-33}{3}$$ $$y = -11$$ Ответ: y = -11