Resposta :
mmc de (x,3x,5)
x,3x,5/5
x,3x,1/x
1,3,1/3
1,1,1
(5*x*3) = 15x
45/15x + 30/15x = 3x/15x
elimine os denominadores (5x)
45 + 30 = 3x
3x = 75
x = 75/3
x = 25
x,3x,5/5
x,3x,1/x
1,3,1/3
1,1,1
(5*x*3) = 15x
45/15x + 30/15x = 3x/15x
elimine os denominadores (5x)
45 + 30 = 3x
3x = 75
x = 75/3
x = 25