I believe the answer is x=14
Answer:
-0.75
Step-by-step explanation:
Given:

To find:

Solution:

Solving the equation (i):

Putting the value of x into the equation (ii):

Putting the value of y into the equation (i):

So, the value of 
Learn more:
brainly.com/question/10151402
Answer:
4
Step-by-step explanation:
÷ 
(20-4) ÷ 4
16 ÷ 4=4