document.write( "Question 939802: A(x+2)+B(2x+1)=3,then find the value of (A+B). \n" ); document.write( "

Algebra.Com's Answer #573386 by Fombitz(32388) $\"\"$ $\"About$

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$\"A%28x%2B2%29%2BB%282x%2B1%29=3\"$
\n" ); document.write( " $\"Ax%2B2A%2B2Bx%2BB=3\"$
\n" ); document.write( " $\"%28A%2B2B%29x%2B%282A%2BB%29=3\"$
\n" ); document.write( "So then,
\n" ); document.write( " $\"A%2B2B=0\"$
\n" ); document.write( " $\"2A%2BB=3\"$
\n" ); document.write( "From the first,
\n" ); document.write( " $\"A=-2B\"$
\n" ); document.write( "Substitute,
\n" ); document.write( " $\"2%28-2B%29%2BB=3\"$
\n" ); document.write( " $\"-4B%2BB=3\"$
\n" ); document.write( " $\"-3B=3\"$
\n" ); document.write( " $\"B=-1\"$
\n" ); document.write( "Then,
\n" ); document.write( " $\"A=-2%28-1%29\"$
\n" ); document.write( " $\"A=2\"$
\n" ); document.write( "So,
\n" ); document.write( " $\"A%2BB=2-1\"$
\n" ); document.write( " $\"highlight%28A%2BB=1%29\"$
\n" ); document.write( " \n" ); document.write( "

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