
Por Manoel em 10/04/2016 08:12:37
X + X - 16 = 7X >>>>>>>>>>>>>>> 3X + 2X + 16 = 7X >>>> (MMC de 3 e 2= 6)
2 3 10 6 10
15X + 10X - 480 = 21X >>>>>>>>>>>> (MMC de 6 e 10 = 30)
30 30
25X - 480 = 21X >>>>>>>>>>>>>>>> (Mesma base)
25X - 21X = 480 >>>>>>>>>>>>>>> 4X = 480
X = 120 resposta e.
2 3 10 6 10
15X + 10X - 480 = 21X >>>>>>>>>>>> (MMC de 6 e 10 = 30)
30 30
25X - 480 = 21X >>>>>>>>>>>>>>>> (Mesma base)
25X - 21X = 480 >>>>>>>>>>>>>>> 4X = 480
X = 120 resposta e.