Posted by gaetano on Wednesday, January 2, 2013 at 6:44am.
double the first 6x + 10y = 30.6 6x + 2y = 16.2 , the second now subtract them 8y = 14.4 y = 1.8 back in first 3x + 5(1.8) = 15.3 3x = 6.3 x = 2.1 x=2.1 , y=1.8