How do you solve the system #x + y = 2# and #2x + y = -1#?
from this equation
put the value of
This is a simultaneous equation question. In the interest of time, I will solve it using the elimination method:
To solve using elimination, all we do is literally subtract the bottom line from the top line which gets rid of the y
We then substitute (
And then check that this works, using substituting both values into the second equation.