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OpenStudy (tkhunny):
Have you considered dividing by -3?
OpenStudy (anonymous):
no, i literally have no clue how to do this, i'm trying this class out before taking it next year
OpenStudy (tkhunny):
Can you solve this?
3x = 15
OpenStudy (anonymous):
divide 3x by 3 and 15 by 3 which gives you 5, right?
OpenStudy (anonymous):
3x/3 will give me x
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OpenStudy (anonymous):
x=5
OpenStudy (tkhunny):
Very good. Why is the present problem any different? Divide by -3, EXACTLY like you just divided by 3 in my little sample problem.
OpenStudy (anonymous):
i divide -3 by -12?
OpenStudy (anonymous):
the |x+7| thing confuses me
OpenStudy (anonymous):
i divided -3 by -12 and i got 0.25, is that right?
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OpenStudy (tkhunny):
Why does it matter?
3x = 12 ==> x = 4
3Frog = 12 ==> Frog = 4
3yz = 12 ==> yz = 4
3(x+2) = 12 ==> (x+2) = 4
3|x+7| = 12 ==> |x+7| = 4
3Pittsburgh = 12 ==> Pittsburgh = 4
Works every time.
You are dividing by -3. You are not dividing by -12.