Question 863018
<span style='font-family: arial;'>Let N = Neil's age
Let N-4 = Ben's age, as neil is 4 years older
{{{4ben+5neil=128}}}
{{{4(n-4)+5n=128}}}
Distribute 4
{{{4n-16+5n=128}}}
Combine like terms
{{{9n-16=128}}}
Add 16 to both sides
{{{9n=144}}}
Divide both sides by 9
{{{n=16}}}
Neil is 16 years old, and, since Ben is 4 years younger, Ben is 12.</span>