The length of the segment RT is the sum of the lengths of RS and ST:
RT = RS + ST
We have:
RT = 56
RS = 2x + 18
ST = 24
So, using those expressions, we find:
RT = RS + ST
56 = 2x + 18 + 24
56 = 2x + 42
Now, to solve this equation, we can apply a sequence of the same operations on both sides of the equation, until we isolate the variable x and find its value:
There are 360 seals on a beach. Of them 9/20 pups. The rest are adult seals. How many seal pups are on the beach? What percent of the seals on the beach are pups?
