Question

Rezolvati urmatoarele ecuatii,unde a este numar natural:
5a-13=3a+5
7a+2=4a+17
5+8a=21+4a
9+3a=24-2a
4a-3=11-3a
3a+12=44-5a
Ajutati-ma va rog! !

Answer 1

5a_3a=13+5
2a=18
a=18:2
a=9
7a+2=4a+17
7a-4a=17-2
3a=15
a=15:3
a=5

5+8a=21+4a
8a-4a=21-5
4a=16
a=16:4
a=4

9+3a=24-2a
3a+2a=24-9
3a=15
a=15:3
a=5

4a-3=11-3a
4a+3a=11+3
7a=14
a=14:7
a=2

3a+12=44-5a
3a+5a=44-12
8a=32
a=32:8
a=4

Answer 2

5a-13=3a+5  5a-3a=5+13  2a=18  a=18:2=9
7a+2=4a+17 7a-4a=17-2  3a=15   a=15:3=5
5+8a=21+4a   8a-4a=21-5  4a=16  a=16:4=4
 9+3a=24-2a   3a+2a=24-9  5a=15  a=15:5=3
4a-3=11-3a  4a+3a=11+3   7a=14   a=14:7=2
3a+12=44-5a   3a+5a=44-12  8a=32  a=32:8=4