Pearson Algebra 2 Common Core, 2011
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Pearson Algebra 2 Common Core, 2011 View details
5. Systems With Three Variables
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Exercise 16 Page 171

Can you manipulate the coefficients of any variable terms such that they could be eliminated?

Practice makes perfect
The given system consists of equations of planes. Notice that the coefficient of in the first equation is the additive inverse of the coefficient of in the second equation; they will add to be Let's use the Elimination Method to find a solution to this system.
We can start by adding the first equation to the second equation to eliminate the
Having eliminated the variable from the second equation, we can continue by creating additive inverse coefficients for in the first and third equations. Then, we can add or subtract these equations to eliminate from the first equation.