Question

Срочно Алгебра .......... . .........

Answer 1

3) 
x - 7 = 14
x = 14 + 7
x = 21

4)
21 - 5x = 6
-5x = 6 - 21
-5x = -15
x=3

5)
x + x + 4 + x = 16
3x = 16 - 4
3x = 12
x = 12/3
x = 4

6)
х + 5 + х + 6 = 21
2x = 21 - 11
2x = 10
x = 10/2
x = 5

7) 
х + 2х - 5 = 40
3x = 40 + 5
3x = 45
x = 45/3
x = 15

8)
0.1x = 3
x = 3/0.1
x = 3 * 10
x = 30