AbigailOcampo AbigailOcampo 16-10-2016 Mathematics contestada Simplify each expression.1.) 4.2x + 8.1x + 1.8x - 2.1x2.) x + 2 (x - y)3.) (5x + y) - (4x - 9)4.) 33.7y + 8.4 - 2.04y