Answer:
The answer to your question is x = 15
Step-by-step explanation:
Use proportions to solve this problem

Solve for "x"
x = 
Simplification
x = 
Result
x = 15
C
-28 is his debt and adding or paying +7 every week
mult .13 with 134
add that to 134
then divide by 2 then that should be your answer