document.write( "Question 71115: –3(10x – 3) + 10(3x – 3) = x – 7 \n" ); document.write( "

Algebra.Com's Answer #50830 by checkley75(3666) $\"\"$ $\"About$

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-3(10X-3)+10(3X-3)=X-7
\n" ); document.write( "-30X+9+30X-30=X-7
\n" ); document.write( "-30X+30X-X=-7-9+30
\n" ); document.write( "-X=14
\n" ); document.write( "X=-14
\n" ); document.write( "PROOF
\n" ); document.write( "-3(10*-14-3)+10(3*-14-3)=-14-7
\n" ); document.write( "-3(-140-3)+10(-42-3)=-21
\n" ); document.write( "-3*-143+10*-45=-21
\n" ); document.write( "429-450=-21
\n" ); document.write( "-21=-21 \n" ); document.write( "

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