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SOLUCIÓN
12-4X+6=5X
12+6=9X
18=9X
X=18/9
X=2---------RPTA
12 - 4x + 6 = 5x
12 + 6 = 5x + 4x
18 = 9x
18/9 = x
2 = x
Solución :
x = 2