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Emicool6
a fost răspuns

rezolvati:
[( a+90)×5+ 100] : 600=1



Răspuns :

(5a+450+100):600=1
(5a+550):600=1
5a+550=600x1
5a=600-550
5a=50
a=50:5
a=10
Moldcell20
[(a+90)*5+100]:600=1
[(5a+90*5)+100]:600=1
[(5a+450)+100]:600=1
(5a+550):600=1
(5a/600+550/600)=1
(5a/600+11/12)=1
a/120+11/12=1
a/120=1/12
120a/120=120/12
a=120/12
a=10