Question

a recipe calls for 6 cups water and 4 cups of flour if the recipe is increased how many cups of water should be used with 6 cups of flour

Answer 1

$6\ cups\ of\ water\ for\ 4\ cubs\ of \ flour\\\\ x\ cups\ of\ water\ for\ 6\ cubs\ of \ flour\\\\making\ proportion\\\\ 6-4\\x-6\\\\cross\ multiplication\\\\ 6*6=4x\\\\ 36=4x\ \ \ \ | divide\ by\ 4\\\\ x=9\\\\ 9\ cups\ of\ water\ should\ be\ used.$