Respuesta :
Dang what kinda math they teaching you! that makes no sense! ill try and help though
Let the number = x
then (10-x) = 2(x-1)
10-x=2x-2
3x=12
x = 4
then (10-x) = 2(x-1)
10-x=2x-2
3x=12
x = 4