Answer:
-2.1
Step-by-step explanation:
x= 4/5
you put in 4/5 where x is supposed to be so you get: -2/5 - 4/5 + (-9/10)
-2/5 - 4-5 = -6/5
-6/5= -12/10
-12/10 + -9/10= -21/10 = -2.1
