401. Решите уравнение: a) 13,6y-3,64=1,8; б) (3,7x-1,24)-2,5=8.

Решим уравнение а):

1. $$13.6y - 3.64 = 1.8$$
2. $$13.6y = 1.8 + 3.64$$
3. $$13.6y = 5.44$$
4. $$y = \frac{5.44}{13.6}$$
5. $$y = 0.4$$

Ответ: y = 0.4

Решим уравнение б):

1. $$(3.7x - 1.24) \times 2.5 = 8$$
2. $$3.7x - 1.24 = \frac{8}{2.5}$$
3. $$3.7x - 1.24 = 3.2$$
4. $$3.7x = 3.2 + 1.24$$
5. $$3.7x = 4.44$$
6. $$x = \frac{4.44}{3.7}$$
7. $$x = 1.2$$

Ответ: x = 1.2