Solve the system using matrices. Show all the row operations that you use.
3x-9y=30
2x+5y= -2
In google type:
2x2 System of Equations - Solver that Shows Steps
When you see list of results clik on:
2x2 System of Equations - Solver that Shows Steps - Math Lessons
When page be open type your coefficients:
3 , - 9 , 30
and
2 , 5 , -2
Click on:
Solve by using Cramer's rule
and click:
Solve System
You will see solutions step-by-step