Someone help and please make sure it’s right

Answer:
25*
Step-by-step explanation:
all angles in a triangle will equal 180*
180-135=45
the two anlges with x need to = 45 \
the number thst works for that is 5 4times5=20 and 5times5=25 togather they = 45
so "x" equals 5 therefore making <a 25*