Solve the equation using substitution?
Is a collection of well defined and distinct objects.
Ex: ( A B C D E) all letters
Ex2: ( January, February, March, April) all months
So he worked 30.5 hours, he just didn't write some of the hours down. To find the hours he didn't write down, you subtract 8+

+

from 30.5, which equals
Answer:
144
Step-by-step explanation:
54+90=144
144-90=54
90+54=144
144-54=90