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4. Aflați x din proporţia:
a) x-1/12x+10 = 1/3
b) x+1/3x-1 = 1/2​


Răspuns :

Răspuns:

a) x-1/12x+10=1/2

(x-1)*2=(12x+10)*1

2x-2=12x+10

-2-10=12x+2x

14x=-12

7x=-6

x=6/7

b) x+1/3x-1=1/2

(x+1)*2=(3x-1)*1

2x+2=3x-1

x=1

Sper ca te-am ajutat!