document.write( "Question 574791: I'm trying to solve B x .20 = 30 for B. \n" ); document.write( "

Algebra.Com's Answer #369294 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+B%2A%28.2%29+=+30+\"$
\n" ); document.write( "It's always OK to do the same thing to both
\n" ); document.write( "sides of the equation, so
\n" ); document.write( "Divide both sides by $\"+.2+\"$
\n" ); document.write( " $\"+%28+B%2A%28.2%29%29+%2F+.2+=+30+%2F+.2+\"$
\n" ); document.write( "Notice that you can rewrite the left side like this:
\n" ); document.write( " $\"+B+%2A+%28.2%2F.2%29++=+30+%2F+.2+\"$
\n" ); document.write( " $\"+.2%2F.2+=+1+\"$ , so
\n" ); document.write( " $\"+B+=+30%2F.2+\"$
\n" ); document.write( "It is also OK to multiply one side by $\"+1+\"$ , so
\n" ); document.write( "multiply the right side by $\"+1+\"$ and say $\"+1+=+10%2F10+\"$
\n" ); document.write( " $\"+B+=+%28+10%2F10+%29%2A%2830%2F.2%29+\"$
\n" ); document.write( "Rewrite this as:
\n" ); document.write( " $\"+B+=+%28+30%2A10%29+%2F+%28+.2%2A10%29+\"$
\n" ); document.write( " $\"+B+=+300+%2F+2+\"$
\n" ); document.write( " $\"+B+=+150+\"$
\n" ); document.write( "-----------
\n" ); document.write( "You can check this by putting it back into original equation:
\n" ); document.write( " $\"+B%2A%28.2%29+=+30+\"$
\n" ); document.write( " $\"+150%2A%28.2%29+=+30+\"$
\n" ); document.write( "Now rewrite this as:
\n" ); document.write( " $\"+%28+15%2A10%2A.2%29+=+30+\"$
\n" ); document.write( " $\"++15%2A2+=+30+\"$
\n" ); document.write( " $\"+30+=+30+\"$
\n" ); document.write( "OK \n" ); document.write( "

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