240. Решите уравнение: 1) 7x + 2x = 3,528; 2) 14x - 6x - 0,14 = 5,5;

1) $$7x + 2x = 3,528$$ $$9x = 3,528$$ $$x = 3,528 : 9$$ $$x = 0,392$$ 2) $$14x - 6x - 0,14 = 5,5$$ $$8x - 0,14 = 5,5$$ $$8x = 5,5 + 0,14$$ $$8x = 5,64$$ $$x = 5,64 : 8$$ $$x = 0,705$$ Ответ: 1) x = 0,392 2) x = 0,705