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Rezolvati in Q ecuatia :
a) 3(x+5) - 6(x-2) = 4(x+2) - 5(x-4)


Răspuns :


3x+15-6x+12=4x+8-5x+20

-3x+27=-x+28

-2x=1

x=-0.5


3x+15-6x+12=4x+8-5x+20
3x-6x-4x+5x=8+20-15-12
-2x=1
x=-1/2