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Rezolvati in R ecuatia:
a) 3(2x-1)+7=5(x-1)+7


Răspuns :

6X-3+7=5X-5+7
6X-5X=-5+7+3-7
X=2+3-7
X=5-7
X=-2
6x - 3 + 7 = 5x - 5 + 7
6x + 4 = 5x + 2
6x - 5x = 2 - 4
x = - 2