1. Which method should I use?
Solving Systems of Equations

2. Graphing Substitution Elimination
Equations in y= form
makes this method useful.
Graph/grid is given.
In contrast, if neither equation has “y” isolated, you are better off using another method.
For this , at least one variable in one of the equations should be isolated.
Best when “ y= ----” or “x= ---- ” is given.
Better choice when algebra is quick but can be tedious if multiple steps.
If both equations are in standard form Ax+By=C, If the coefficients of the x’s or y’s in both equations are the same, elimination will get a solution quickly with minimal steps.
If sometimes one or both equations have to be multiplied by a number to make the variable cancel, it can lead to extra work.