Using the TI-83 solver to solve linear equations:

  1. Put the equation in the form of 0=f(x).

    2. For example: 3x + 10 = 5 -> 3x + 5 = 0

  2. Choose MATH
  3. Press 0 to select the solver
  4. The screen should display "EQUATION SOLVER at the top, if not press the up arrow.
  5. Enter the equation in 0 = form.

    6. For example 0=3x + 5

  6. Press ALPHA and then ENTER.
  7. The solution to the linear equation will be displayed as X =

Examples:

1. Solve y = 5x +1 for y = 0

Enter 0=5x+1 into the solver

  1. Solve y = 5x + 1 for y = 21

    2. 21 = 5x +1

    0 = 5x + 1 – 21

    0= 5x –20

    Enter 0 = 5x – 20 into the solver

  2. Carla charges $10 per lawn for mowing. She has purchased a

lawnmower for 129.95.

a) How many lawns must she mow to break-even?

Y = 10x – 129.95

0 =10x – 129.95

Enter 0 = 129.95 into the calculator

    1. How many lawns must she mow to make $ 75?

75 = 10x – 129.95

0 = 10x – 129.95 – 75

0 = 10x – 204.95

Enter 0 = 10x – 204.95 into solver.

  1. Try this: If Y = 5x +7
    1. Solve Y= 0
    2. Solve y = 21