Help me its been 1 hour uh

Ineed asap.i cant understand this question i need someone to me right away

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given