How do you solve the system #x - 2y = 2 # and #x + y = 5#?
1 Answer
Mar 10, 2018
Explanation:
The quickest way in this particular set is probably by substitution.
Rearranging the first equation,
Substituting into the second equation,
Collecting terms and rearranging
That is
which implies
Substituting this value for
which implies
It is always worth checking the solution, so substituting these values into the second equation gives