# How do you solve the system y=x-1 and x+y =3?

##### 1 Answer

Mar 3, 2018

Since only one of the variables is defined, we can use the **substitution** method so first, substitute for **y**

Then, combine like terms and solve for **x**

Now that we know what **x** is, we can substitute for **x** in the other equation to find **y**

Now that we know what both **x** and **y** are, we can substitute for the variables

**(correct)**

**(correct)**

We can now conclude the answer