4*(0,7х-0,3)-5*(0,2х-0,6)=-3,8-3

Question

4*(0,7х-0,3)-5*(0,2х-0,6)=-3,8-3

Answer 1

2.8x - 1.2 - 1x + 3 = -0.8
1.8x + 1.8 = -0.8
1.8x = -0.8 - 1.8
1.8x = - 2.6
x = -2.6 - 1.8
x = - 4.4
В: -4.4

Comments

2.8x - 1.2 - 1x + 3 = -6.8

---

1.8x + 1.8 = -6.8

---

1.8x = -6.8 - 1.8

---

1.8x = -5

---

x=-5:1.8

---

x = - 2.78

---

Правильное решение -2.78, в первом я немного ошиблась, извините)