The sum of two numbers is 55 and the difference is 7. what are the numbers?

larger number:
smaller number:

Solve 3x-18=2y and 5x-6y=6 by elimination show work

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.

What expression is equivalent to (84+16)