Texas Instruments TI-89 Titanium Manual page 9

This function will allow you to solve for a specific variable. For
example, solve for: 3x^3-2x*y+3y=2
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Step 1 On your home screen press F2 and then press 1 or enter.
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Step 2 Enter in the equation after solve as:
solve(3x^3-2x*y+3y=2,y)
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Step 3 Press enter and it will solve for y.
You can also solve for a system of equations using the solve
function. For example: 3x-5y=4 and -2x+5y=6
•
Step 1 On your home screen press F2 and then press 1 or enter .
•
Step 2 Enter in the equation after solve as so: solve(3x-5y=4
and -2x+5y=6, {x,y}). *You can access the word and by
ND
pressing 2
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Step 3 Press enter and it will solve for x and y.
, 5, 8, 8.