8,2х-(5,8х+4)=-0,6х-1)=? 02*(5у-2)=0,3*(2у-1)-0,9=?

Question

8,2х-(5,8х+4)=-0,6х-1)=?
02*(5у-2)=0,3*(2у-1)-0,9=?

Answer 1

Первое 
2,4х-4=-0.6х-1
2.4х+0,6х=4-1
3х=3
х=1

Comments

второе 1у-0.4=0.6у-0.3-0.9

---

1у-0.6у=0.4-0.3-0.9

---

0.4у=-0.8

---

у=-2

Answer 2

2,4х-4=-0,6х-1
3х=3
х=1

у-0,4=0,6у-1,2
0,4у=-0,8
у=-2