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5x-1 pe 3 =x-2 pe 4 va roog

Răspuns :

5x-1/3 amplificam cu 4=>20x-4/12
x-2/4 amplificam cu 3=>3x-6/12
20x-4/12=3x-6/12
20x-3x=-6+4
17x=-2
x=-2: 17
x=-0, 11
 5x -1      x-2
-------- = --------
   3           4

4(5x-1) = 3(x-2)
20x-4=3x-6
20x-3x=-6+4
17x=-2
x=-2/17

iar daca avem:
5x - 1/3 = x-2/4
5x-x=-1/2 +1/3
24x=-3+2
24x=-1
x=-1/24