Question

rezolvati in multimea R ecuatia:
7x=21
9x=3
5x-2/3=0
4x-1/7=0
3/4x-1/2=0
0,2-10=0
-10x+0,2=5
24x+1=9
ajutatima va rog!!!!!!

Answer 1

Răspuns:

Explicație pas cu pas:

7x = 21, x = 21/7 = 3

9x = 3, x = 3/9 = 1/3

5x = 2/3, x = 2/(3*5) = 2/15

4x = 1/7, x = 1/(4*7) = 1/28

3/4x = 1/2, x = 1/2 :3/4 = 1/2*4/3 = 2/3

0,2x = 10,  x = 10/0,2 = 100/2 = 50

etc.