Respuesta :
let the number be x
a.t.g.c
5x = 21+ 2x
5x-2x = 21
3x = 21
x = 21/3
x = 7 give me brainliest
a.t.g.c
5x = 21+ 2x
5x-2x = 21
3x = 21
x = 21/3
x = 7 give me brainliest