How to murder algebra

Idly poking around the net I found this example:

Mathway example
x+4x=9
Solve for x
Answer
Move all terms that don’t contain x to the right-hand side and solve.
x=9/5

I cried !

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2 Comments

Filed under algebra, errors, horrors, mistakes

2 responses to “How to murder algebra

  1. It IS heartbreaking; isn’t it?

  2. Definitely. Obviously what they meant was:

    x + 4x = 9
    x + x = 94
    2x = 94
    x = 294

    And there we go.

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