Question 192014
Let  x  = 1st  even  no

let (x+2)  =  2nd even  no

2L-L=12

2(x+2)-(x+2) =12
(x+2)=12
subst  2  each  side
x=10

check  10  is  smaller  no,  12  is  larger  no
2*12-12=12    ok