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2x =30 / :2
x= 15
spr.
3*15 -15= 45 -15 =30
Odjemnik - 15
!5 x 3=45
45-15=30
x = 3y
x = 30+y
x = 3y
2x = 30+y+3y
2x = 30+4y
x = 15+2y
x = 45
y = 15