<PRE><B>Question 110451</B>
{{{sqrt(5-x) - 4 = 6}}}
:
Add 4 to both sides:
{{{sqrt(5-x) = 6 + 4}}}
{{{sqrt(5-x) = 10}}}
:
Square both sides and you have:
(5 - x) = 10^2
 5 - x = 100
    -x = 100 - 5
    -x = 95
:
x has to be positive, multiply equation by -1 and you have:
     x = -95
:
:
Check solution in original equation:
{{{sqrt(5-(-95)) - 4 = 6}}}
{{{sqrt(5 + 95) - 4 = 6}}}; remember minus a minus is a plus
{{{sqrt(100) - 4 = 6}}}
   10 - 4 = 6; confirms our solution
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