Решите уравнения 2 1.6х+14=0.4х+0.4 -4(3-5у)=3 (6у-2)-4

1) 1,2x=-13,6 ⇒ 
2) -12+20y=18y-6-4 ⇒ 2y=2 ⇒ y=1

1,6х + 14 = 0,4х + 0.4
1,6х - 0,4х = 0,4 - 14
1,2х = - 13,6
х = - 13,6 : 1,2
х = - 13 6/10 : 1 2/10
x = - 13 3/5 : 1 1/5
x = - 68/5 : 6/5
x = - 68/5 * 5/6
x = - 11 1/3


- 4 * (3 - 5y) = 3 * (6y - 2) - 4
- 12 + 20y = 18y - 6 - 4
20y - 18y = - 10 + 12
2y = 2
y = 2 : 2
у = 1