How do you solve # y=x-2# and #y=4x+1#?
This is called system of equations because you are searching a pair of numbers that inserted as
To solve a system of equation you have to use one equation to express one variable as a function of the other, and substitute the result in the second equation.
In your case you have
Here I replaced the "value" of
Now you have an equation in one variable that you can solve as usual
With a value for
and, with the second equation
It works! Then our solution is given by