Find a+b when: 2009a+2008b=20072008a+2009b=7002
Subtracct second equation from the first
a - b = - 4995 a = -4995 + b
2009 ( -4995+b) + 2008 b = 2007
2008 b + 2009 b = 10036962
b = 2498.621
then a = -2496.379