How do you solve by substitution #-x + 2y = -6# and #3x + y = 8#?
1 Answer
Apr 29, 2018
Explanation:
In the second equation, we can easily solve for
We've already solved for one variable in terms of the other, so we can plug into the first equation. We get
We can subtract
Dividing both sides by
We can plug into our equation for
Hope this helps!