Question

Rezolvati urmatoarele ecuatii , unde a este numar natural :
a) 5a-13=3a+5
b)7a+2=4a+17
c)5+8a=21+4a
d)9+3a=24-2a
e)4a-3=11-3a
f)3a+12=44-5a

Answer 1

1)5a-13=3a+5.....5a-3a=13-5....2a=12....a=12/2=6.......2)7a+2=4a+17.... 7a-4a=17-2.....3a=15...a=15/3=5....3)5+8a=21+4a.....8a-4a=21-5....4a= 16...a=16/4=4......4)9+3a=24-2a.....3a+2a=24-9.....5a=15...a=15/5=3.. ....5)4a-3=11-3a....4a+3a=11+3.....7a=11+3...7a=14...a=14/7=2...... 6)3a+12=44-5a....3a+5a=44+12.....8a=56...a=56/8=7 :-)