Substitution Steps

Selam H
Mind Map by Selam H, updated more than 1 year ago
Selam H
Created by Selam H almost 7 years ago
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Pre-Calculus Math (Algebra) Mind Map on Substitution Steps, created by Selam H on 05/03/2013.
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Substitution Steps
1 1. Find the equation with a variable by itself

Annotations:

  • 2x + 3y= 24 2x + y= 8 * = equation with variable by itself
2 2. Solve for the variable by itself. (Sometime it is already solved for you.)

Annotations:

  • 2x + y= 8 changes to y= 8 - 2x
3 3. Substitute or plug in the equation that is solved into the one that isn't.

Annotations:

  • 2x - 3(8 - 2x)= 24
4 4. Solve this equation and get one of the answers (y or x).

Annotations:

  • 2x - 3(8 - 2x) = 24 ... y = -12
5 5. Plug your answer from step four into one of your equations (doesn't matter which one)

Annotations:

  • 2(-6) - 3y = 24        Answer: x = -6, y = - 12
6 6. Solve and get last answer (y or x).
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