document.write( "Question 71646: How do you write an equation for the following problems:\r
\n" ); document.write( "\n" ); document.write( "1. Kevin weighs 10 pounds more than Tim. The sum of their weight is 470 pounds. How much does Tim weigh?\r
\n" ); document.write( "\n" ); document.write( "2. Bryson's new computer costs $178.50 less than his old one. The sum of the costs of the two computers is $3,500. How much did his old computer cost?\r
\n" ); document.write( "\n" ); document.write( "3.Kelsey is 4 years older than Kierra. Five years ago the sum of their ages was 14. How old is Kelsey?\r
\n" ); document.write( "\n" ); document.write( "4. A rectangle has length three times its width. The perimeter of the rectangle is 56 inches. Find the length of the rectangle.
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Algebra.Com's Answer #51240 by ptaylor(2198)\"\" \"About 
You can put this solution on YOUR website!
1.
\n" ); document.write( "Let x=Tim's weight
\n" ); document.write( "Then (x+10)=Kevin's weight
\n" ); document.write( "And x+(x+10)=470 get rid of parens
\n" ); document.write( "x+x+10=470 collect like terms
\n" ); document.write( "2x+10=470\r
\n" ); document.write( "\n" ); document.write( "2.
\n" ); document.write( "Let x= cost of his old one
\n" ); document.write( "Then (x-$178.50)= cost of his new one
\n" ); document.write( "And x+(x-$178.50)=$3500 get rid of parens
\n" ); document.write( "x+x-$178.50=$3500
\n" ); document.write( "2x-$178.50=$3500 \r
\n" ); document.write( "\n" ); document.write( "3.
\n" ); document.write( "Let x=Kelsey's age
\n" ); document.write( "(x-5)=Kelsey's age five years ago
\n" ); document.write( "Then (x-4)=Kierra's age
\n" ); document.write( "((x-4)-5)=Kierra's age five years ago
\n" ); document.write( "And (x-5)+((x-4)-5)=14 get rid of parens
\n" ); document.write( "x-5+x-4-5=14 collect like terms
\n" ); document.write( "2x-14=14\r
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\n" ); document.write( "\n" ); document.write( "4.
\n" ); document.write( "Let x=length
\n" ); document.write( "Then x/3=width
\n" ); document.write( "Perimeter=2l+2w
\n" ); document.write( "And 2x+2(x/3)=56 get rid of parens
\n" ); document.write( "2x+2x/3=56 Multiply each term by 3
\n" ); document.write( "6x+2x=168\r
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\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor\r
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