Question 56775
The sum of two numbers is 86.  The second is 1 more than 4 times the first.  What are the two numbers?

Let x+y =86
x+(4x+1)=86
x+4x+1=86
5x+1=86
5x=86-1
5x=85
5x/5=85/5
x=17 [First number]
.
(4x+1) [The second number]
4(17)+1
69 
.
So, 17+69=86