<PRE><B>Question 895758</B>
Complementary angles add up to 90 degrees.
Let A be the first angle, and B be the second.
A + B = 90 (complementary)
A = 2B+10
Substitute the value of A from the second equation into the first.
A + B = 90
(2B+10) + B = 90
3B + 10 = 90
Subtract 10 from each side
3B = 80
Divide each side by 3
B = 26{{{2/3}}} degrees
A is twice that plus 10.
A = (26{{{2/3}}}*2)+10
A = 53{{{1/3}}}+10
A = 63{{{1/3}}}
63{{{1/3}}}+26{{{2/3}}}=90 degrees</PRE>