Question

If 1 is added to twice the number n, the result is the same as if n were increased by 9. What is the number n?

Answer 1

n = 8

Explanation:

twice the number n is 2n and 1 added to it is 2n + 1 , then

2n + 1 = n + 9 ( subtract n from both sides )

n + 1 = 9 ( subtract 1 from both sides )

n = 8

the number n is 8