The triangles are similar. Find the value of x. Show all work.

Question part points submissions used suppose that 100 lottery tickets are given out in sequence to the first 100 guests to arrive at a party. of these 100 tickets, only 12 are winning tickets. the generalized pigeonhole principle guarantees that there must be a streak of at least l losing tickets in a row. find l.

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

How do you use the elimination method for this question? explain, because i really want to understand!