Answer:

Step-by-step explanation:

substitute (1) to (2):
add x to both sides

subtract 5 from both sides


substitute the values of x to (2):

Answer:
5
Step-by-step explanation:
The equation looks like 4x=20
Divide each side by 4 to get x=5
Thus x+5
Answer:
it depends how much the cds cost.
Answer:
64
Step-by-step explanation:
*the sum of a triangle in degrees is 180*
44-72= 116
180-116= 64