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3a divided by 5 - 6 = 3

Guest Feb 25, 2017
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 #1
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\(\frac{3a}{5-6} = 3 \\ \frac{(5-6)3a}{5-6}=3(5-6) \\ 3a=3(-1) \\ a=-1\)

 

If you meant - 6 not in the denominator it's:

 

\(\frac{3a}{5}-6 = 3 \\ \frac{3a}{5}-6+6 = 3 + 6 \\ \frac{3a}{5} = 9 \\ \frac{(5)3a}{5} = (5)9 \\ 3a=45 \\ 3a/3=45/3 \\ a=15\)

hectictar  Feb 25, 2017
 #2
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\(\dfrac{3a}{5}-6 = 3\\ \dfrac{3a}{5}=9\\ \dfrac{a}{5}=3\\ a=15\)

MaxWong  Feb 25, 2017

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