How do I solve this problem? One number is one more than twice another number. Their sum is 91. Find the numbers.

Question

My daughter has a word problem and I'm stuck. 

one number is one more than another number. Their sum is 91. Find the numbers. 

Answer 1

n = the first number

2n + 1 = the 2nd

 

n +2n + 1 = 91

3n = 90

n = 30

 

2(30) + 1 = 61