See this ShareLaTeX article for spacing details. Basically there are various code for graduating space distances. \, \: \; are the ones most likely to be used for spacing between variables in a LaTeX code equation.
When trying to solve a problem, you may run into a situation with 2 variables. At first you may feel stumped. But just take a breath and ask yourself: “Is this a situation where one of the variables may be redefined by some factor of the other variable?” What does this mean? a situation with… Read more One way of solving an equation with 2 variables