How do you solve the system of equations #x+ y = 3# and #x = 3y - 5#?
3 Answers
Explanation:
You must make an equation that has only one variable in it so you can solve for that variable. By finding the variable you can use it to find the other one.
Let's solve for
substitute
"
Now we need to find
"
Explanation:
#x+y=3# #x=3y-5#
From the first equation, we can determine a value for
Substituting
Add
Add
Divide both sides by
Substituting
Subtract
Explanation:
Note the each equation has a single
Therefore we can have:
However, the
There are now 2 ways to find a value for