Answer:
Step-by-step explanation:
You want the measures of the acute angles in a right triangle when one is twice the difference of the other and 12.
Let x represent one acute angle. Then the other is (90 -x) and the relationship between them is ...
x = 2((90 -x) -12) . . . . . one is twice the difference of the other and 12
x = 2(78 -x) . . . . . . . . simplify inside parentheses
3x = 156 . . . . . . . . . . add 2x
x = 52 . . . . . . . . . . . divide by 3
90-x = 38 . . . . . . . find the other angle
The smaller angle is 38°; the larger angle is 52°.