I need hello with the following Math Problem.
Jamir had a lot of Lego blocks. The pieces in his bin have either 6 knobs on the top, or 4 knobs. One day Jamie gets bored and counts all of the knobs on the tops of all of the pieces, and comes up with 280 knobs! He also knows that his bin contains 55 total Lego pieces, but he can't remember how many of each type he has. Help Jamir figure out the number pieces with 6 knobs, and the number of pieces with 4 knobs in his bin.