Question

If 0.25 (4f-3) = 0.05 (10f-9), then f is equal to :
(a) 0.6
0.8
(c) 0.5
(b)​

Answer 1

Answer:

Step-by-step explanation:

0.25(4f−3)=0.05(10f−9)

   distributive

   ⇒0.25(4f)+0.25(−3)=0.05(10f)−0.05(−9)

   simplify

   ⇒1f−0.75=0.5f−0.45

   ⇒f−0.75=0.5f−0.45

   combine like terms

   ⇒f−0.5f=0.75−0.45

   ⇒0.5f=0.30

   get variable alone: f=0.30÷0.5=0.6

   ∴f=0.6