Answer:
n= 5
Step-by-step explanation:
n + 0.5(n-1) = 7
n + 0.5n - 0.5 = 7
1.5n = 7 + 0.5
1.5 n = 7.5
n = 7.5 × 10/1.5 × 10
n = 75/15
n = 5 ( Answer)