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2 (x + 12) - 3 (2x -1 ) = 5x + 9

Răspuns :

2x+24-6x+3=5x+9
-4x-5x=9-24-3
-9x=-18
x=2
2x+24-6x+3=5x+9
-4x+27=5x+9
-4x-5x=9-27
-9x=-18
x=2