Answer:
Step-by-step explanation:
-4 = 5 + f....we want to isolate f, so subtract 5 from both sides
-4 - 5 = 5 - 5 + f
-9 = f <===
ANSWER

EXPLANATION
The given equation is:

Group similar terms to obtain:

Simplify similar terms,

Divide both sides by -2.5


So i got 90 4/7 reduced in fractions
#1. About 15.
5x3
#2. About 9
26/3=8 2/3