if x is one of the angles, then, the other angle is 2x + 6. The two angles are complementary, that is, they add up 90 degrees.
Then, you can write:
x + 2x+ 6 = 90
by solving for x the previous equation, you obtain:
x + 2x + 6 = 90
3x + 6 = 90
3x = 90 - 6
3x = 84
x = 84/3
x = 28
and the value of the measure of other angle is:
2x + 6 = 2(28) + 6 = 62
Hence, the measures of the two angles are 28° and 62°