Basic Geometry help!!!!

http://i40.tinypic.com/15qc689.png

If m∠1 = (4x+12)°, m∠2 = (7x+3)°, and m∠3 = 6y°
Then x = ______, M∠1 = _________, m∠2 = _________, and y = ________.

Ten points!

(4x+12)° + (7x+3)° =180°

x = 15 M∠1 = 72° m∠2 = 108° y = 12