−4.2x+3 and 2.5x−6 Add the two expressions

all together is -4.7x 

PART 1: Let's simplify step-by-step.−4.2x+3 There are no like terms. Answer:=−4.2x+3 PART 2:  Let's simplify step-by-step.2.5x−6 There are no like terms. Answer:=2.5x−6