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experts plz help

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by gmatboost » Sat Aug 06, 2011 6:18 am
They all have 1 solution. In fact, the first three are the same equation:
-3 - x = -3x

I suspect there may be an issue of some sort with the parentheses.
The only way an equation of this sort can have no solution is if there is the same "amount of x" on both sides. Something like: 2x + 3 = 2x + 5

Then, 3 = 5, which is never true.
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by GmatKiss » Sat Aug 06, 2011 7:45 am
IMO: E

3X=3X
3x-3x=0
0=0

No solution!
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by Tani » Sat Aug 06, 2011 12:15 pm
You are reading E as 3x = (-3)*(-x), but that is not how it is given.

The problem shows 3x=(-3)-x, removing the parentheses 3x = -3-x

Even if you got 3x = 3x then you would have an infinite number of solutions. In other words, your equation would be correct no matter what value you used for x.
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