Hey there!
f.8=8f
0.8f = 8f
SUBTRACT 8f to BOTH SIDES
0.8f - 8f = 8f - 8f
SIMPLIFY IT!
-7.2f = 0
DIVIDE -7.2 to BOTH SIDES
-7.2f/-7.2 = 0/-7.2
CANCEL out3 -7.2/-7.2 because it give you 1
KEEP: 0/-7.2 because it help solve for the f-value
NEW EQUATION: f = 0/-7.2
SIMPLIFY IT!
f = 0
Therefore, your answer is: f = 0
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)