\left\{ \begin{array} { l } { y - 5 = 0 } \\ { x = - y } \end{array} \right.
Solve for y, x
x=-5
y=5
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\left\{ \begin{array} { l } { y - 5 = 0 } \\ { x = - y } \end{array} \right.
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y=5
Consider the first equation. Add 5 to both sides. Anything plus zero gives itself.
x=-5
Consider the second equation. Insert the known values of variables into the equation.
y=5 x=-5
The system is now solved.
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