10. (UnB) As retas 4x + 6y – 5 = 0 e 14x + 30y + 2 = 0 interceptam-se em um ponto M. A reta que passa por M e é perpendicular à reta de equação 12x +1 = 5y é:
a) 5x + 12y – 2 = 0    b) 5x = 12y + 8 = 0       c) 10x + 24y = 0      d) 10x + 24y + 7 = 0

RESOLUÇÃO PFV!!
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