Question 663759


think of a number {{{x}}},increase it by {{{4}}}
 {{{x+4}}}

 and double the answer

{{{(x+4)2}}}

the result is {{{20}}} more than the number {{{x}}}


{{{(x+4)2=x+20}}}..solve for {{{x}}}

{{{2x+8=x+20}}}

{{{2x-x=20-8}}}

{{{highlight(x=12)}}}