Fatal error: Uncaught TypeError: array_push(): Argument #1 ($array) must be of type array, null given in /home/zweigmedia2/www/www/summariesContent/twoVarLinEquations.php:22 Stack trace: #0 /home/zweigmedia2/www/www/summariesContent/twoVarLinEquations.php(22): array_push(NULL, '#[The following...') #1 /home/zweigmedia2/www/www/summariesContent/summariesScriptsNV.php(187): include('/home/zweigmedi...') #2 /home/zweigmedia2/www/www/summaryHolder.php(15): include('/home/zweigmedi...') #3 {main} thrown in /home/zweigmedia2/www/www/summariesContent/twoVarLinEquations.php on line 22