Can someone explain me this? ? it's very important for me

i understand (i) fully but (ii) is confusing

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Multiply. write your answer in simplest form. 3/8 x 5/7

Which of these would have been most likely to have been a carpetbagger during the reconstruction era? a) a new york businessman who relocated to mississippi b) a former slave who was able to buy land in birmingham c) a carolina-born politician who supported the democratic d) a former confederate officer who owned a farm in memphis eliminate