Question

X=√rt{15 - 2 \times } " alt="x = \sqrt{15 - 2 \times } " align="absmiddle" class="latex-formula">
15-2x

Answer 1

The answer:  " x = 5 " .
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Explanation:
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Given:   "  x = √(15 − 2x) " ;  Solve for "x" ; 
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  "Square" each side of the equation:
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      → (x)²  =  [√(15 − 2x) ] ²  ; 

  →   x  =  15 − 2x   ;

Now, add "2x" to each side of the equation:

 →   x + 2x = 15 − 2x + 2x  ;

 →    3x = 15 ; 

Now, divide each side of the equation by "3" ; 
     to isolate "x" on one side of the equation; & to solve for "x" ; 

 →    3x / 3 = 15 / 3  ; 

 →    " x  =  5 " .
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