
Hope you could get an idea from here.
Doubt clarification - use comment section.
Answer:
A
Step-by-step explanation:
What number is 25% of 64....
x = 0.25(64)
x = 16 <=== ur solution
X is equal to 4
Because RS + ST=RT
So basically x+3x=5x-4
4x=5x-4
-4x -4x
-1x=-4
x=4