Alain F. answered 04/25/19
Native speaker for French and Master in Science Grad for Math!
One okapi + one llama = 450 kgs
3 llama = one okapi + 190
one okapi = 450 kgs - one llama
3 llama = 450 kgs - one llama +190 kgs
4 llamas = 640 kgs
1 llama = 160 kgs
1 okapi = 450 kgs - 160 kgs
1 okapi = 290 kgs