Question 825717
You have two congruent legs which means that you have an isosceles right triangle. Therefore, you basically have a 45-45-90 triangle (the base angles are equal to 45)


So...


angle B = 45 degrees


3x = 45


x = 45/3


x = <font color="red">15</font>


and


angle C = 45 degrees


y+7 = 45


y = 45-7


y = <font color="red">38</font>