Recall that if
[tex]|a|=b,[/tex]
then,
[tex]a=-b\text{ or a=b.}[/tex]
Therefore, if
[tex]|2.5x-6.8|=12.9[/tex]
then,
[tex]2.5x-6.8=12.9\text{ or }2.5x-6.8=-12.9.[/tex]
Answer:
Negative case:
[tex]2.5x-6.8=-12.9[/tex]
Positive case:
[tex]2.5x-6.8=12.9[/tex]
