Answer:
4.2 (to 1d.p.)
Explanation:
=9/2 9/2 = 4.5
Multiply both sides by (n-3.2)
n+0.3 = 4.5(n-3.2)
Now expand the brackets
n+0.3 = 4.5n - 14.625n
Now rearrange to make n the subject
n + 0.3 = 4.5n -14.625
-n -n
4.5n - n -14.625 = 0.3
3.5n -14.625 = 0.3
+14.625 +14.625
3.5n = 14.925
÷3.5 ÷3.5
n = 4.2