Hi, 

m∠x = a + 3 and m∠y = 2a + 6

Angles Complementary

 (a+3) + (2a+6) = 90°

     3a = 81°

      a = 21°

 ∠x = 24°      || (a+3) 

RELATED QUESTIONS

∠x and ∠y are complementary. If m∠x = a + 3 and m∠y = 2a + 6,... (answered by nerdybill)

Suppose ∠A and ∠B are complementary angles. If ∠A = 2x-6 and ∠B =  (answered by LinnW)

If ∠PLA and ∠ELA are complementary, ∠PLA = 5x – 2, and ∠ELA = x +  (answered by Fombitz)

If ∠PLA and ∠ELA are complementary, ∠PLA = 5x – 2, and ∠ELA = x +  (answered by Fombitz)

∠A and ∠B are supplementary angles. If m∠A = 2x + 16 and m∠B =... (answered by ikleyn)

∠P and ∠Q are supplementary angles. If m∠P = 2x + 3 and m∠Q = 3x... (answered by richwmiller)

∠a and ∠b are supplementary. If m∠a = 2x + 4 and m∠b = 4x - 10,... (answered by Alan3354)

∠a and ∠b are supplementary. If m∠a = 2x + 4 and m∠b = 4x - 10,... (answered by Tatiana_Stebko)

∠a and ∠b are supplementary. If m∠a = 2x + 4 and m∠b = 4x - 10,... (answered by jim_thompson5910)