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Which variable is ready to be eliminated? 2x - y =-15 -2x + 5y = 3

Which variable is ready to be eliminated? 2x - y =-15 -2x + 5y = 3-example-1
User BeaverProj
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1 Answer

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We have a system of two equations:


\begin{gathered} 2x-y=15, \\ -2x+5y=3. \end{gathered}

We want to reduce the system to an equation with only variables, we see that by adding the equations we can achieve that. This is because the terms with x cancel each other:


\begin{gathered} (2x-y)+(-2x+5y)=15+3, \\ 4y=18. \end{gathered}

Answer

i) Variable x is ready to be eliminated.

ii) Adition is required to eliminate the variable.

Reason: by adding the equations we see that variable x is eliminated:


\begin{gathered} (2x-y)+(-2x+5y)=15+3, \\ 4y=18. \end{gathered}
User Shibi
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