document.write( "Question 556231: x+7+x=15 \n" ); document.write( "
Algebra.Com's Answer #362092 by Theo(13342)\"\" \"About 
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x + 7 + x = 15
\n" ); document.write( "combine like terms to get:
\n" ); document.write( "2x + 7 = 15
\n" ); document.write( "subtract 7 from both sides of the equation to get:
\n" ); document.write( "2x = 15 - 7 = 8
\n" ); document.write( "divide both sides of the equation by 2 to get:
\n" ); document.write( "x = 4
\n" ); document.write( "substitute in the original equation to get:
\n" ); document.write( "4 + 7 + 4 = 15
\n" ); document.write( "simplify to get:
\n" ); document.write( "15 = 15
\n" ); document.write( "this confirms the value of x is good.
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