In an obtuse isosceles triangle the angle measurements are, x∘, x∘, and (10x−2)=128∘. find the measurement of one of the acute angles varsity tutors

we know that
the sum of the internal angles of a triangle is 180 degrees
so
 in this problem
(10x−2)=128∘>; 10x=128+2> 10x=130>; x=130/10
x=13°
the angles are
13°, 13° 
and
the third angle is equal to
180-2*(13)=154°

the answer is
the measurement of one of the acute angles is 13 degrees