How do you solve $abs [3x+9]=7$ ?

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Answer 1 · 2017-09-04T14:19:50

The answer is $-2/3$ or $-16/3$ .

Given:

$|3x+9|=7$

therefore, either

$3x+9=7" " or " "-3x-9=7$

$3x=7-9" " or " "-3x=7+9$

$3x=-2" " or " "-3x=16$

$x=-2/3" " or " "x=-16/3$

The answer is $-2/3$ or $-16/3$ .

How do you solve abs [3x+9]=7abs [3x+9]=7?