( 1+3+5+...........+2007+2009+2011) x (125125 x 127 - 127127 x 125), 151 -2 x (X -6) = 2227 : 17, 2012 x X + 4 - 2010 x X = 2018

a) ( 1+3+5+...........+2007+2009+2011) x (125125 x 127 - 127127 x 125)
b. 151 -2 x (X -6) = 2227 : 17
c. 2012 x X + 4 - 2010 x X = 2018