document.write( "Question 61177: 5x+4x=7k\r
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Algebra.Com's Answer #42112 by tutorcecilia(2152)\"\" \"About 
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5x+4x=7k [combine like-terms]
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\n" ); document.write( "9x/9=7k/9
\n" ); document.write( "x=7k/9
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\n" ); document.write( "check by plugging in (x-7k/9) back into the original equation.
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