Posted by Eric on .
How do I write the equation for this input 0 2 4 6 8 output 21 19 17 15 13?

5th grade input/output 
PsyDAG,
input plus output = 21

5th grade input/output 
malik sterling,
i don't know input/output add25

5th grade input/output 
jakos,
sorry

5th grade input/output 
arianna,
2 divided by 6+9=