Answer:

Step-by-step explanation:
Isolate the variable by doing operations to both sides of the equation.
The work is shown below:

Answer:
33
Step-by-step explanation:
first you set up the problem, supplementary angles equal 180 degrees so the equation should look like, 4x+x+15=180. then you solve from there by combining like terms and you should get x equal to 33
Answer:
about 5.3
Step-by-step explanation:
What’s the question that you have