How to Make a Simultaneous Equations Program on a Ti-84 Plus

You can calculate simultaneous equations on your TI-84 graphing calculator. Creating a program that solves simultaneous equations will require you place the coefficients of each equation into a matrix. The coefficients are the numbers representing the multiplier of each variable. For example, if the equation is "6x +7y = 13", the coefficients would be "6" "7" and "13".

Instructions

1. Press "2nd" then "MATRX" on your TI-84 graphing calculator.

2. Press "Edit" then press "1."

3. Enter a "2x3" matrix then enter the coefficients from the two equations. For example, if your equations were "6x +7y = 13" and "4x +8y=15", you would enter the coefficients for the first equation on the top line, and the coefficients for the second equation on the bottom line.

4. S3: Press "2nd" "Quit" then "2nd" "MATRX."

5. Select "Math" from the list then press "ALPHA" "B" then "2nd" "MATRX" "1" ")" then press "Enter." The solution to the simultaneous equations will appear on your screen.

References

• Texas Instraments: Knowledge Base