Apple + pear = 250 grams, Apple + peach = 180 grams, pear + peach = 230 grams?

Apple + pear = 250 grams, Apple + peach = 180 grams, pear + peach = 230 grams?


Apple + pear + peach = (250 + 180 + 230) △ 2 = 330g
Peach = 330-250 = 80g
Pear = 330-180 = 150g
Apple = 330-230 = 100g



How to do 5 / 6 plus 1 / 2 minus 1 / 2 plus 4 / 5?


5/6+1/2-1/2+4/5
=5/6+(1/2-1/2)+4/5
=5/6+4/5
=25/30+24/30
=49/30