Question 500130
Complementary angles total 90 degrees.
.
A = one angle
B = another angle.
.
A+B = 90 because they are complementary.
So, A = 90-B.
.
A = 2B + 18
.
A = A
.
90-B = 2B + 18
90 = 3B + 18
72 = 3B
3B = 72
B = 24
.
A = 90-B
A = 90-24
A = 66
.
Always check your work.
.
2B+ 18 = 2(24) + 18 = 48+18 = 66
Correct.
.
Answer:
The two angles are:  24 and 66.
.
Done.