Answer:
9.
Step-by-step explanation:
Answer:
f = 1
Step-by-step explanation:
Use the method of cross- multiplication
= ⇒ ad = bc, thus
20f = 5(f + 3) ← distribute
20f = 5f + 15 ( subtract 5f from both sides )
15f = 15 ( divide both sides by 15 )
f = 1
Answer:
-2
Step-by-step explanation: