document.write( "Question 256851: The sum of three times a number and 7 more than the number is the same as the difference between -11 and twice the number. What is the number?\r
\n" ); document.write( "\n" ); document.write( "I have tried:
\n" ); document.write( "3x+7=-11-2x
\n" ); document.write( "3x+2x=-11-7
\n" ); document.write( "x=-18
\n" ); document.write( "This is wrong according to my instructor. The answer is actually supposed to be -3. How?
\n" ); document.write( "

Algebra.Com's Answer #188887 by Earlsdon(6294)\"\" \"About 
You can put this solution on YOUR website!
Try this!
\n" ); document.write( "3x+(x+7) \"The sum (+) of three times a number (3x) and seven more than the number (x+7)\" is the same as:
\n" ); document.write( "-11-2x \"the difference (-) between -11 and twice the number (2x)
\n" ); document.write( "Putting it al together, we get:
\n" ); document.write( "3x+x+7 = -11-2x Simplify.
\n" ); document.write( "4x+7 = -11-2x Add 2x to both sides.
\n" ); document.write( "6x+7 = -11 Subtract 7 from both sides.
\n" ); document.write( "6x = -18 Finally, divide both sides by 6.
\n" ); document.write( "x = -3 Voila!
\n" ); document.write( "
\n" );