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6x + 6 - 20x + 12 = x - 3 - x - 5
- 14x + 18 = - 8
- 14x = - 8 - 18
- 14x = - 26
x = -26/-14
x = 13/7
Solución :
x = 13/7
2(9X) -4(2X)=(-2X)-(6X)
18X -8X =-2X-6X
10X= -8X