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How can I use after solve(eq) the result? For example, the result for this simple linear system
[x + 2y + 4z - 1] [ x + 4z - 5] [ 3x + 6*z - 6] is [[x == -1, y == -2, z == (3/2)]] How can I use x,y,z in an expression, say x^2+y^2+z^2 ?

How can I use after solve(eq) the result? For example, the result for this simple linear system

[x + 2y 2*y + 4z 4*z - 1]
[      x + 4z 4*z - 5]
[    3x 3*x + 6*z - 6]

[[x == -1, y == -2, z == (3/2)]]

How can I use after solve(eq) the result? For example, the result for this simple linear system

[x + 2*y + 4*z - 1]
[      x + 4*z - 5]
[    3*x + 6*z - 6]

is

[[x == -1, y == -2, z == (3/2)]]

How can I use x,y,z in an expression, say x^2+y^2+z^2 ?

How can I use after solve(eq) the result? For example, the result for this simple linear system

[x + 2*y + 4*z - 1]
[      x + 4*z - 5]
[    3*x + 6*z - 6]

is

[[x == -1, y == -2, z == (3/2)]]

How can I use x,y,z in an expression, say x^2+y^2+z^2 ?