Answer:
The value of x in the given figure is, 
Step-by-step explanation:
Complementary angle states that the two angles sum up to 90 degree.
From the given figure
and
are complementary angles.
by definition of complementary angles;

Subtract
from both sides we get;

Simplify:

therefore, the value of x in the given figure is, 
You would do
51-5= 46
then you would divide
46/2= 23
so Susan is
23+5=28
Susan is 28 years old and her sister is 23
28+23=51
Answer:
Jen used a card to make the purchase, and she received a bill within 15 days of the purchase. She paid $21.30 for the next 18 months until the bill was paid in full. The full payment included $58.60 in interest.
Step-by-step explanation: