How do you solve #2x-y=6# and #x+y=-3#?
There are 3 ways to solve this. Here is one way:
Line them up:
Add all that goes together:
Put it back into an equation:
Plug what x equals (1) into one of the previous equations:
These are called simultaneous equations. Multiply both equations so they both have the same leading coefficient. Use the coefficient of
Then subtract the two equations