document.write( "Question 145486This question is from textbook College Algebra
\n" ); document.write( ": How many pounds of extra-lean hamburger that is 7% fat must be mixed with 30 pounds of hamburger that is 15% fat to obtain a mixture that is 10% fat? \n" ); document.write( "

Algebra.Com's Answer #106164 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"x\"$ = pounds of extra-lean hamburger to be added
\n" ); document.write( "In words:
\n" ); document.write( "(pounds of fat in the extra-lean) + (pounds of fat in reg hamburger)
\n" ); document.write( "divided by total pounds of meat = 10% fat mixture
\n" ); document.write( " $\"%28.07x+%2B+.15%2A30%29+%2F+%28x+%2B+30%29+=+.1\"$
\n" ); document.write( "multiply both sides by $\"x+%2B+30\"$
\n" ); document.write( " $\".07x+%2B+4.5+=+.1%2A%28x+%2B+30%29\"$
\n" ); document.write( " $\".07x+%2B+4.5+=+.1x+%2B+3\"$
\n" ); document.write( " $\".03x+=+4.5+-+3\"$
\n" ); document.write( " $\".03x+=+1.5\"$
\n" ); document.write( " $\"x+=+50\"$
\n" ); document.write( "50 lbs of extra-lean hamburger must be used
\n" ); document.write( "check:
\n" ); document.write( " $\"%28.07x+%2B+.15%2A30%29+%2F+%28x+%2B+30%29+=+.1\"$
\n" ); document.write( " $\"%28.07%2A50+%2B+.15%2A30%29+%2F+%28x+%2B+30%29+=+.1\"$
\n" ); document.write( " $\"%283.5+%2B+4.5%29+%2F+%2850+%2B+30%29+=+.1\"$
\n" ); document.write( " $\"8+%2F+80+=+.1\"$
\n" ); document.write( " $\".1+=+.1\"$
\n" ); document.write( "OK \n" ); document.write( "

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