Решите уравнение 2х+1/ 8,1 =2/1.8

Question

Решите уравнение 2х+1/ 8,1 =2/1.8

Answer 1

2х=2/1.8-1/8.1
2х=10/9-10/81
2х=90/81-10/81
2х=80/81
х=80/81÷2
х=80/81×1/2
х=40/81

Comments

давай

---

0.7×(3х-1)=2.8×5

---

2.1х-0.7=14

---

2.1х=14+0.7

---

2.1х=14.7

---

х=14.7÷2.1

---

х=7