# How do you solve the system #2a+b=3, 5a=15, a+b+c=-1# using matrices?

##### 1 Answer

Oct 23, 2016

Please see the explanation for the procedure.

#### Explanation:

Write

Add the row for

Add the row for

Divide the first row by 5:

Multiply the first row by -2 and then add to row 2:

Subtract row 1 from the row 3:

Subtract row 2 from row 3:

Check:

This checks