In the question, we are given a right triangle, meaning that the place where there is a square like angle is equal to [tex]90[/tex] degrees. Since we know the values and expressions for all three angles, we can use the triangle sum theorem to make them all equal to [tex]180[/tex] degrees. We get [tex]25+3x+11+90=180[/tex]. First, we can combine like terms on the left-hand side of the equation. Doing this, we get [tex]3x+126=180[/tex]. After we do this, we subtract [tex]126[/tex], so we can slowly start to isolate the variable we are solving for, [tex]x[/tex]. This gives us [tex]3x=54[/tex], and when we divide by [tex]3[/tex], we get [tex]\boxed{x=18}[/tex], which is our answer. Hope this has helped and have a fantastic day!
