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Rezolvati ecoatiile:
a) 3(n-7)=n+37
b)  [tex] \frac{x-13}{y+13} = \frac{1}{14} [/tex]
c) n(n+2)=n(n+1)

Răspuns :

Miky93ask
1)3n-21=n+37
3n-n=37+21
2n=58
n=58:2
n=29

2)14(x-13)=1*(y+13)
14x-182=y+13
14x=y+13+182

14x=y+195
x= (y+195)/14

x/y= (y+195)/14/y=  (y+195)/14 * 1/y=  (y+195)/14y

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