On one machine for 1 h made 6 details, and on another - is 2 details more, than on the first. In how many hours on each machine separately it is possible to make 216 details? In how many hours can two machines make 252 details, working at the same time? I need only the scheme and the decision it is not necessary

309
1 h - 6 it is put. - h - 216 it is put. 1 h - 2 it is put. - h - 216 it is put. Resheniye: 1) 216:6=36(ch) - 1 machine will make 216 details. 2) 216:2=108(ch) - the 2nd machine will make 216 details. Answer: 36 h; 108 h 1 h - 6 it is put. } 1 h - 2 it is put. } h - 252. Resheniye: 1) 252:6=42(ch) - for 1 machine. 2) 252:2=126(ch) - for the 2nd machine. 3) 42+126=168(ch) - only. Answer: 168 h.
205
Answer add