\left\{ \begin{array} { l } { x + 2 = 0 } \\ { y - x = \pi } \\ { z + y = 1 } \end{array} \right.
Solve for x, y, z
x=-2
y=\pi -2\approx 1.141592654
z=3-\pi \approx -0.141592654
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x=-2
Solve x+2=0 for x.
y-\left(-2\right)=\pi
Substitute -2 for x in the equation y-x=\pi .
y=\pi -2 z=-y+1
Solve the second equation for y and the third equation for z.
z=-\left(\pi -2\right)+1
Substitute \pi -2 for y in the equation z=-y+1.
z=3-\pi
Calculate z from z=-\left(\pi -2\right)+1.
x=-2 y=\pi -2 z=3-\pi
The system is now solved.
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