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Answer:
-15
Step-by-step explanation:
[tex] \frac{f}{3} + 22= 17[/tex]
Minus 22 on both sides:
[tex] \frac{f}{3} = 17 - 22[/tex]
[tex] \frac{f}{3 } = - 5[/tex]
Multiply both sides by 3:
f= -5(3)
f= -15