Systems of Equations
There are a couple of ways to approach this problem, but I will show you two ways.
If there needs to be a substitution to check your answer, then you can do so. If there is no case for a substitution, then you can decide if you need to check your answer to match the computation.
About The Author
|Math, Biology, And History Instructor|
|Hello. I am Kisung Yoon, and I am a senior in high school. I am currently in the ARISTA Honor Society, and I have tutored my fellow students from my school in Algebra I, Algebra 2, Global History, US History, and Biology. Not only that, I also tutored my younger sisters on the standardized tests mai...|