\left\{ \begin{array} { l } { x = 3 } \\ { y = 2 } \\ { x + y = z } \end{array} \right.
Solve for x, y, z
x=3
y=2
z=5
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3+2=z
Consider the third equation. Insert the known values of variables into the equation.
5=z
Add 3 and 2 to get 5.
z=5
Swap sides so that all variable terms are on the left hand side.
x=3 y=2 z=5
The system is now solved.
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