Answer :
180=x+x+32 180 is equal to x(amount of colored marbles) plus x+32 (amount of plain marbles)
180=2x+32
-32+180=2x
148/2=x
74=x
74 colored marbles and 106 plain
180=2x+32
-32+180=2x
148/2=x
74=x
74 colored marbles and 106 plain
74 (180 - 32) / 2 because if there are 32 more than the other part, it is n + (n+32)