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rezolvati in Z ecuatia: 1-7x-14=6-5x-15

Răspuns :

1-7x-14=6-5x-15
-7x+5x=6-15-1+14
-2x=4
x=-2
-7x-13=-5x-9
-2x=-9+13
-2x=4
-x=4:2
-x=-2