How to do solve system of equations with three variables?
1 Answer
If there are
Lets say
You will follow these three steps:
-
By using
C , writez in terms ofx andy -
Replace
z with its equivalent inB . Then writey in terms ofx -
In
A , replacey with its equivalent and replacez with its equivalent (if its equivalent involvesy , replacey ) then solveA forx .
Now you should know the value of
Finally, you should have written
Example
Lets find
We are writing
Now we are plugging
So we can write
Now we are plugging
Now we know the value of
By using
By using
So