MathPup Defense Algebra

The Snow Noids are trying to take over MathPup's fort.  Blast them off the screen by solving for X and using the snow cannon..  Don't let them get past MathPup and watch out as on later levels the Noids start bringing shields!

Click on a cannon in front of a Snow Noid to move MathPup over to it.  Then solve for X and click that number to fire the cannon.  Shooting a Noid with a wrong number for X will make them speed up.