What is the solution of |3 x + 9| ≤ 15 ?

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What is the solution of |3 x + 9| ≤ 15 ?

a.  - 8 ≤ x ≤ 2

b.  - 2 ≤ x ≤ 8

c.  - 24 ≤ x ≤ 6

d.  -15 ≤ x ≤ 15

Apr 29th, 2015

answer is OPTION A     - 8 ≤ x ≤ 2


 |3 x + 9| ≤ 15 ?

3x + 9 ≤   +/-15

-15  ≤  3x + 9 ≤  +15

-15 - 9 ≤  3x  ≤  +15 - 9

-24     ≤  3x  ≤  +6

-24/3  ≤  x  ≤  +6 /2

-8  ≤  x  ≤  2

Apr 29th, 2015

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