Question

gente por favor e pra amanhã me ajudem !

Answer 1

x/3 + x/4 + 3x/10 + 140 = x
mmc (3, 4, 10) = 60
60:3.x + 60:4.x + 60:10.3x + 60:1.140 = 60:1.x
20x + 15x + 18x + 8400 = 60x
10x + 15x + 18x - 60x = -8400
53x - 60x = -8400
-7x = -8400 .(-1)
7x = 8400
x = 8400/12
x = 700 (700 estudantes)