document.write( "Question 417399: I'm having problems understanding this equation. -4x+9x=-30 \n" ); document.write( "
Algebra.Com's Answer #292215 by htmentor(1343)\"\" \"About 
You can put this solution on YOUR website!
You need to collect terms and solve for x.
\n" ); document.write( "\"-4x%2B9x=-30\"
\n" ); document.write( "\"5x=-30\"
\n" ); document.write( "Divide both sides by 5:
\n" ); document.write( "\"x=-6\"
\n" ); document.write( "To check, substitute the value for x in the original equation:
\n" ); document.write( "(-4)(-6) + (9)(-6) = 24 - 54 = -30
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