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Vilka [71]
3 years ago
14

If 3x / 4 = 7 - x / 3, then x = what?

Mathematics
1 answer:
Alja [10]3 years ago
5 0
\frac{3x}{4} = 7-\frac{x}{3} 


\frac{3x*3}{4*3} =  \frac{7*12}{12} -\frac{x*4}{3*4} 


\frac{9x}{12} = \frac{84}{12} -\frac{4x}{12}
12*( \frac{9x}{12} = \frac{84}{12} -\frac{4x}{12} )
9x=84-4x

13x=84
84/13


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