The measurements of the acute interior angles are
A. 26 degrees, 64 degrees
How to find the angle measures
The sum of the other angles, aside the right triangle is complementary
128x + (51 - 50x) = 90
collect like terms
128x - 50x = 90 - 51
78x = 39
x = 39/78
x = 1/2
Substituting to find the angles
angle A = 128x = 128 * 1/2 = 64 degrees
angle B = 51 - 50x = 51 - 50 * 1/2 = 51 - 25 = 26 degrees