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Rezolvati in Q urmatoarele ecuatii:
a)4x+7=x-3
b)3(2x+1)=5x-2
c)2(x-4)-7=3(1-x)-15


Răspuns :

4x+7=x-3 4x-x=-3-7 3x=-10 x=-10:3 x=- si impartirea o efectuezi
b) 3(2x+1)=5x-2
6x+3=5x-2
6x-5x=-3-2
x=-5