What equality is shown above

Look at attachment. has all info needed. need

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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