If the ratio of the degree of the complement of an acute angle to the degree of its remainder is 4:1, what is the angle?

If the ratio of the degree of the complement of an acute angle to the degree of its remainder is 4:1, what is the angle?

Let this angle be x, then we have:
180-x=4(90-x);
3x=180;
x=60;
The angle is 60 degrees
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