document.write( "Question 785626: find x
\n" ); document.write( "when the long leg is 12, the short leg is x, and the hypotenuse is x+8
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Algebra.Com's Answer #477649 by waynest(281)\"\" \"About 
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c^2 = a^2 + b^2
\n" ); document.write( "c = x + 8, a = 12, b = x
\n" ); document.write( "(x + 8)^2 = 12^2 = x^2
\n" ); document.write( "x^2 + 16x + 64 = 144 + x^2
\n" ); document.write( "x^2 - x^2 + 16x + 64 -64 = 144 - 64 + x^2 - x^2
\n" ); document.write( "16x = 80
\n" ); document.write( "16x/16 = 80/16
\n" ); document.write( "x = 5\r
\n" ); document.write( "\n" ); document.write( "check:\r
\n" ); document.write( "\n" ); document.write( "(5 + 8)^2 = 12^2 + 5^2
\n" ); document.write( "13^2 = 169
\n" ); document.write( "169 = 169
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