Find the area of the triangle shown

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

Katie wants to collect over 100 seashells. she already has 34 seashells in her collection. each day, she finds 12 more seashells on the beach. katie can use fractions of days to find seashells. write an inequality to determine the number of days, dd, it will take katie to collect over 100 seashells.

Guys can y’all me because i don’t understand to the questions of my cousin she tell me to do the homework plz me guys