Find the values of x in the following equation:
|9x + 9| = 18

Question

Find the values of x in the following equation: 
|9x + 9| = 18

anonymous · Answer

1 and -2

anonymous · Answer

oops

anonymous · Answer

remove absolute values signs and write TWO  equations

anonymous · Answer

$$9x+9=18$$
$$9x+9=-18$$ solve both of these to get your answer

anonymous · Answer

as stroogle said, first one gives 
$$x=1$$ but second one give 
$$9x=-27$$
$$x=-3$$

anonymous · Answer

your x is between -18 and +18 to get the absolute operator off the eq.

anonymous · Answer

Good way to deal with these is to square, then take the root of both sides of the equation. This gets rid of the absolute value, and gives:
$$9x+9=\pm18$$
giving 1 and -3 (I wrote the wrong answer above sorry)

anonymous · Answer

the root??? c'mon.

anonymous · Answer

$$-18\le9x+9\le18$$$$-27\le9x \le9$$$$-3\le x \le1$$

anonymous · Answer

look if 
$$|\text{blah}|=p$$ then either 
$$\text{blah}=p$$ or 
$$\text{blah}=-p$$ that is all. remove absolute value, solve two equations. finito

anonymous · Answer

good lord another answer.  @daomown question says EQUAL not less than.  course if it said LESS THAN your answer would be right

anonymous · Answer

the point is that in order to solve the abs value you need to put those less thans so that way you are indicating your algebraic expression is between both integers (-18 and 18 in this case), of course the way it solves is that x = -3, and x=1

jhonyy9 · Answer

9x+9=18        and   9x+9=-18
9x=9                           9x=-27
x=1                               x= -27/9 = -3