Respuesta :
he used 3 1/2 bags of seed for the front......he used 3 times as much for the back
so he used :
3 * 3 1/2 =
3 * 7/2 =
21/2 =
10.5 (or 10 1/2) bags for the back yard <==
so he used :
3 * 3 1/2 =
3 * 7/2 =
21/2 =
10.5 (or 10 1/2) bags for the back yard <==