Question

Va rog mult ajutatima dau choroana la ex 2,3,4

Answer 1

2)
4=28/7
1/9=4/36
12/11≠8/9
10/23=30/69
0/21=0/7
1/100=23/2300

3
3/2=21/14   adevarat
0/9=0/24   adevarat
2/17=10/170 fals
5³/81=125/3⁴ adevarat

4
x/18=4/9
x=4*18/9=8

5/15=(10-x)/27
1/3=(10-x)/27
10-x=27/3
10-x=9
x=1

4/9=36/(11x-7)
11x-7=36×9/4
11x-7=81
11x=88
x=8

(x-2)/4=(x+3)/5
5x-10=4x+12
x=22