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y en la segunda asi x= 9
14-2x+7x =8-5x+5+8x+4
-2x+7X+5x -8x=8+5+4-14
2x =3
x=2/3
9 (x-1) = 6 (x+3)
9x-9=6x+18
9x-6x=18+9
3x=27
x=27/3
X=9