# How to Solve Systems of Equations in GeoGebra

You can use `GeoGebra` to solve systems of equations.

`GeoGebra` Instruction 1

### Solutionin`CAS`

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, the system of equations has infinitely many solutions.

You can solve a system of equations graphically by plotting all the graphs in the same coordinate system. The solutions are intersections between the graphs.

`GeoGebra` Instruction 2

### Solutionin`Graphics View`

1.
Open `Algebra View` and `Graphics View` under  `View` in  `Menu`.
2.
Enter your equations one by one in `CAS`, pressing `Enter` to start a new row for each.
3.
In `Toolbar`, click `Intersect`  . If you can’t find the button, check that you have the `Toolbar` for `Graphics View` by clicking on any empty space inside the `Graphics View` window. Then find the button under the `Point`  tool list.
4.
Click the graphs in `Graphics View`. The order does not matter.
5.
The solutions are given in `Algebra View` as coordinates of the intersection points.