Solving systems of equations

Task
Solve the following system of equations:[br][math]I:x+2y+3z=60[/math][br][math]II:2x-3y+5z=68[/math][br][math]III:-x+y-z=-13[/math]
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Instructions
[br][table][tr][td]1.[/td][td]Enter the first equation [math]x+2y+3z=60[/math] into the [i]Input Bar[/i] and press [i]Enter[/i].[/td][/tr][tr][td]2.[/td][td]Enter the second equation [math]2x-3y+5z=68[/math] into the [i]Input Bar[/i] and press [i]Enter[/i].[/td][/tr][tr][td]3.[/td][td]Enter the third equation [math]-x+y-z=-13[/math] into the [i]Input Bar[/i] and press [i]Enter[/i].[br][/td][/tr][tr][td]4.[/td][td]Open the context menu of the third equation and select [i]Solve[/i].[br]The equations will be labeled automatically. [/td][/tr][tr][td][/td][td][b]Note: [/b]The solution of the system of equations will be displayed as a list showing the values of the variables [i]x[/i], [i]y [/i]and [i]z[/i].[br]You can press the [img]https://wiki.geogebra.org/uploads/thumb/6/66/Numeric_toggle_button.png/24px-Numeric_toggle_button.png[/img] toggle button for numeric output to show the solution in rounded decimals. Press the corresponding [img]https://wiki.geogebra.org/uploads/thumb/8/8b/Symbolic_toggle_button.png/24px-Symbolic_toggle_button.png[/img] toggle button to change the numeric output into exact output again.[br][/td][/tr][tr][td][br][/td][td][/td][/tr][/table]
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Information: Solving systems of equations