This is an introduction to solving simultaneous equations by the method of elimination.
In the next example only the x terms are the same.
In this example the two equations have the same y terms but with opposite signs.
Care must be taken over the signs as mistakes can easily be made.
In this example the y terms are exactly the same and both signs are negative.
In this example the y terms are exactly the same and both signs are positive.
In this example neither the x or y terms are the same so an adjustment needs to be made.
In these tutorials you are shown how to solve a simultaneous equation by the substitution method. You are also shown how it relates to the intersection of two graphs and why there are two sets of solutions.