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12 September, 09:31

Josefina started to solve for x in the equation

3.5 = 1.9 - 0.8|2x - 0.6| using the steps below:

3.5 = 1.9 - 0.8|2x - 0.6|

1.6 = - 0.8|2x - 0.6|

-2 = |2x - 0.6|

Why did Josefina stop at Step 3?

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Answers (1)
  1. 12 September, 09:33
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    3.5 = 1.9 - 0.8|2x - 0.6|

    3.5 - 1.9 = - 0.8|2x - 0.6|

    1.6 = - 0.8|2x - 0.6|

    1.6/-0.8 = |2x - 0.6|

    -2 = |2x - 0.6|

    2x - 0.6 = - 2 or 2x - 0.6 = 2

    2x = - 2 + 0.6 or 2x = 2 + 0.6

    2x = - 1.4 or 2x = 2.6

    x = - 1.4/2 or x = 2.6/2

    x = - 0.7 or x = 1.3
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