Question

3 a Rezolvați ecuatiile: 1 [7x- 11 - 15;
x 0.36
b Determinati pe x din proportia:
0,72
Anairalari​

Answer 1

Răspuns:

|7x-1| =15

7x-1 =15

7x=15+1

7×=16

x= 16/7

5x-5+4=2x+6-1

5x-2x=5-4+6-1

3x=6

x=2

x/12=0,36/0,72

0,72x=0,36×12

0,72x=4,32

x=6