Question

Not too sure how these work, they’re absolute value equations.

Answer 1

Recall that if

`|a|=b,`

then,

`a=-b\text{ or a=b.}`

Therefore, if

`|2.5x-6.8|=12.9`

then,

`2.5x-6.8=12.9\text{ or }2.5x-6.8=-12.9.`

Answer:

Negative case:

`2.5x-6.8=-12.9`

Positive case:

`2.5x-6.8=12.9`