SOLUTION: I'm trying to check some answers, can someone help? Solve by multiplication principle. My answer was x=7/4 -1/2x=-7/8 Then this one was to be solved with the same method. I got

Algebra ->  Real-numbers -> SOLUTION: I'm trying to check some answers, can someone help? Solve by multiplication principle. My answer was x=7/4 -1/2x=-7/8 Then this one was to be solved with the same method. I got       Log On


   

Question 194434: I'm trying to check some answers, can someone help?
Solve by multiplication principle. My answer was x=7/4
-1/2x=-7/8
Then this one was to be solved with the same method. I got x=-9
9x=-81
Am I close? Thank-you
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
# 1

%28-1%2F2%29x=-7%2F8 Start with the given equation.


x=%28-7%2F8%29%28-2%29 Multiply both sides by -2 (which is the reciprocal of -1%2F2)


x=7%2F4 Multiply and reduce. So you are correct.


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# 2


9x=-81 Start with the given equation.


x=%28-81%29%2F%289%29 Divide both sides by 9 to isolate x.


x=-9 Reduce.


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Answer:

So the answer is x=-9 and again, you are correct.