Two less than eight times an unknown number is -74 find the unknown number?

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

Ihave trouble finding the nth term of a linear sequence

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu