# Math 10 Week 17

This week in math 10 I learned how to use substitution in equations

ex. $\frac{1}{2}$ x – y = 3          2x – 5y = -7

There are 5 Steps:

Step 1: Choose the simplest equation and isolate on of the variables.

Step 2: Substitute the answer from step one into the other equation

Step 3: Solve the single variable equation

Step 4: Substitute the answer from step 4 into the original equation in step one to find the value of the other variable

Step 5: Verify