Question

5+(a+17)=125  Puteti schimba termenii ,acestea trebuie facute cu proba!!!Urgent!
148-(2:a+5)=3
paranteza patrata ,(a-2):98+79inchidem paranteza patrata, :8=10 

Answer 1

5+(a+17)=125
a+17=125-5
a=120-17
a=103
proba
5+(103+17)=125
5+120=125
125=125


148-(2:a+5)=3
148-3=2:a+5
145-5=2:a
140=2:a
a=2/140=1/70

proba
148-(2:1/70+5)=3
148-(140+5)=3
148-145=3
3=3

[(a-2):98+79]:8=10
(a-2):98+79=80
(a-2):98=80-79
(a-2):98=1
a-2=98
a=100

proba
[(100-2):98+79]:8=10
(98:98+79):8=10
(1+79):8=10
80:8=10
10=10