Given:
Consider angle S is congruent to angle U.
The angle S is (5x-11) degrees and angle U is (4x+9) degrees,
To find:
The value of x.
Solution:
Since it is given that angle S is congruent to angle U, therefore the measure of theses two angles are equal because measure of congruent angles are equal.
![m\angle S=m\angle U](https://img.qammunity.org/2021/formulas/mathematics/college/6w235vogvkkicu5ev99c8y5cxwmgxvpi7o.png)
Put the given values.
![5x-11=4x+9](https://img.qammunity.org/2021/formulas/mathematics/college/yf0ytcredracou8iiwbchnch8ut3r2t95y.png)
Subtract 4x from both sides.
![5x-4x-11=9](https://img.qammunity.org/2021/formulas/mathematics/college/efknz5f9wgo3p7plfxw89jmvo9lg0c4p3o.png)
Add 11 on both sides.
![x=9+11](https://img.qammunity.org/2021/formulas/mathematics/college/yrtw2963rfj3mfvfjom25k4cp78ie71du0.png)
![x=20](https://img.qammunity.org/2021/formulas/mathematics/middle-school/pxayb3mctp7l462a1lla5m9rdiwudxu3r9.png)
Therefore, the value of x is 20.