Answer:
-3.7
Step-by-step explanation:
(-y+5.3)+(7.2y-9)=6.2y+n
-y+5.3+7.2y-9=6.2y+n
5.3-9-y+7.2y-6.2y=n
-y+7.2y-6.2y=0 so we will not write the y
n=-3.7
