This hanger is in balance. There are two labeled weights of 10 grams and 31 grams. The 2 diamonds each have the same weight. What is the weight of each diamond, in grams

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil