Answer: THE EXERCISE IS INCOMPLETE. BELOW IS THE EXPLANATION OF A SIMILAR EXERCISE.
Step-by-step explanation:
The question is incomplete because you did not provide the figure, so I will show you how to solve a similar exercise.
See the picture attached. You can observe that:
[tex]ADC=(4y+6)\°+(7y-7)\°[/tex]
By definition, there are 360 degrees in a circle. Based on this, you can write the following equation:
[tex](4y+6)+(7y-7)+(20y-11)=360[/tex]
Then, you need to solve for the variable "y" in order to find its value. You get that this is:
[tex]4y+6+7y-7+20y-11=360\\\\31y-12=360\\\\y=\frac{360+12}{31}\\\\y=12[/tex]
Knowing the value of "y", you can substitute it into the first equation and evaluate. Then, you get the following result:
[tex]ADC=(4(12)+6)\°+(7(12)-7)\°\\\\ADC=131\°[/tex]
