document.write( "Question 117911: The sum of a number and -7 is -12.\r
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Algebra.Com's Answer #85910 by MathLover1(20849) $\"\"$ $\"About$

You can put this solution on YOUR website!

\n" ); document.write( "The sum of a number $\"x\"$ and $\"-7\"$ is $\"-12\"$ we can write like this:\r
\n" ); document.write( "\n" ); document.write( " $\"x%2B%28-7%29+=+-12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+-+7+=+-+12\"$ .....add $\"7\"$ to the both sides\r
\n" ); document.write( "\n" ); document.write( " $\"x+-+7+%2B+7+=+-+12+%2B+7\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x+=+-+5\"$ \r
\n" ); document.write( "\n" ); document.write( "check:\r
\n" ); document.write( "\n" ); document.write( " $\"x%2B%28-7%29+=+-12\"$ ....substitute $\"x\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"%28-5%29%2B%28-7%29+=+-12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-%285%2B7%29+=+-12\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"-12+=+-12\"$ \r
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