Ms. johnson adds 2 cubes of sugar to a 6-ounce cup of tea. ms. huang adds 3 cubes of sugar to a 9-ounce cup of tea.
how to solve it using unit rate. explain.

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.