document.write( "Question 667366: how do we do 3 (x + 5) = 2x + 20 \n" ); document.write( "

Algebra.Com's Answer #415011 by lynnlo(4176) $\"\"$ $\"About$

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3(x+5)=2x+20
\n" ); document.write( "3(5+x)=20+2x
\n" ); document.write( "15+3x=20+2x
\n" ); document.write( "subtract 2x from both sides
\n" ); document.write( " (3x-2x+15=(2x-2x+20
\n" ); document.write( "add like terms in 3x-2x
\n" ); document.write( " 3x-2x=x
\n" ); document.write( "x+15=(2x-2x)+20
\n" ); document.write( " look for sums of zero
\n" ); document.write( " 2x-2x=0
\n" ); document.write( " x+15=20
\n" ); document.write( "isolate terms with x to the left
\n" ); document.write( "subtract 15 from both sides
\n" ); document.write( " x+(15-15)=20-15
\n" ); document.write( "look for two terms with sum of zero
\n" ); document.write( " 15-15=0
\n" ); document.write( " x=20-15
\n" ); document.write( "evaluate 20-15
\n" ); document.write( "20-15=5
\n" ); document.write( "x=5 \n" ); document.write( "

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