Respuesta :
120 of the pens are green.
100-(38+42)=?
100-80=20
20x6= 120
therefore 120 pens are green.
100-(38+42)=?
100-80=20
20x6= 120
therefore 120 pens are green.
If he has 6 boxes with 100 pens in each box that's 600 pens.
38 x 6 = 228 pens are black
42 x 6 = 252 pens are blue
228 + 252 = 480 black and blue pens
600 - 480 = 120 green pens
Hope this helps. :)