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Mathematics 10 Online
OpenStudy (anonymous):

|x – 4| + 7 = 4

OpenStudy (anonymous):

subtract 7 from both sides what do you get as a result?

OpenStudy (anonymous):

3

OpenStudy (anonymous):

be careful... try again...

OpenStudy (anonymous):

-3

OpenStudy (anonymous):

ok... so the equation is now: |x-4| = -3 agreed?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

on the left side is absolute value... can that ever be negative?

OpenStudy (anonymous):

No so now it is x+4=3 ?

OpenStudy (anonymous):

no.... since the left side can NEVER be negative, then no matter how hard you try, you cannot find x so that it will equal -3... in other words, there is NO solution to this equation.

OpenStudy (anonymous):

Thank you

OpenStudy (anonymous):

yw...

OpenStudy (anonymous):

can you help me with this one too? |2x + 4| < 10?

OpenStudy (anonymous):

ok... solving inequalities you'll need to write two separate statements: 2x + 4 < 10 OR 2x + 4 > -10 solve these two and you'll have the solution set....

OpenStudy (anonymous):

x=3 or x=-7

OpenStudy (anonymous):

well < and >

OpenStudy (anonymous):

ive should have written it this way: 2x + 4 < 10 AND 2x + 4 > -10

OpenStudy (anonymous):

x<3 AND x>-7 is correct so anything BETWEEN -7 AND 3 will be a solution to the inequality...

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