# How to Solve Multivariate Systems of Equations in GeoGebra

You can use GeoGebra to solve systems of equations with multiple unknowns.

GeoGebra Instruction 1

1.
Open CAS under  View in  Menu.
2.
Enter your equations one by one in CAS, pressing Enter to start a new row for each of your equations.
3.
Select each of the rows with an equation in them by clicking the boxes with a row number. You’ll know that the row is selected when the box with the row number has turned purple. To select more than one box at a time, hold down the Shift key, click the box of the first equation and then click the box with the row number of the last equation.
4.
Click Solve .

If you get $\left\{\right\}$ as the output, the system of equations has no solution. If GeoGebra returns one of the variables as a function $\phantom{\rule{-0.17em}{0ex}}\left\{x=f\left(x\right)\right\}$, then the system of equations has infinitely many solutions.