Question 1106134
 Alfredo is 5 years older than john
a = j + 5
 and Maria is 4 years younger than john.
m = j - 4
 If the sum of their ages is 34, 
a + j + m = 34
what equation can be used to find John's age?
replace a with (j+5), replace m with (j-4)
(j+5) + j + (j-4) = 34
combine like terms and find j