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13x - 15x = - 6 - 6
- 2x = - 12
x = - 12/-2
x = 6
Solución :
x = 6
VERIFICAMOS :
13x + 6 = 15x - 6
13 (6) + 6 = 15 (6) - 6
78 + 6 = 90 - 6
84 = 84
Listo!!!
6+6=15x-13x
12=2x
12/2=x
6=x