Please help me i don't get these

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle