Respuesta :

[tex] \frac{x}{3} [/tex]  -  5  =  -7  .
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This would be one way to write the expresion/equation; in which "x" represents the unknown number.

Now, to solve for "x" ;
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Given:
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[tex] \frac{x}{3} [/tex]  -  5  =  -7  ;

Add "5" to EACH SIDE of the equation:
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[tex] \frac{x}{3} [/tex]  -  5  + 5 =  -7  + 5 ;

to get:

[tex] \frac{x}{3} [/tex]  = -2 ;

x = (-2 * 3) ;
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x =  - 6 .
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