document.write( "Question 59143: Hello. I hope that someone can help me out with this problem,
\n" ); document.write( "the question is three brick layers and four labour workers make 910$ a day. Ten brick layers and five labour workers make 1 850$. \r
\n" ); document.write( "\n" ); document.write( "A)find an equation for this problem, i cam up with \r
\n" ); document.write( "\n" ); document.write( "3x + 4y = 910
\n" ); document.write( "10x + 5y = 1850\r
\n" ); document.write( "\n" ); document.write( "i dont know if this is right, but if not can you help me find a better equation \r
\n" ); document.write( "\n" ); document.write( "b) Is there an advantage by eliminating one or the other variable first? Explain\r
\n" ); document.write( "\n" ); document.write( "c) how much does 1 brick layer make a day?\r
\n" ); document.write( "\n" ); document.write( "If you can help me out i would greatly appreciate it thank you so much\r
\n" ); document.write( "\n" ); document.write( "kim
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Algebra.Com's Answer #40551 by xerxes0212(2)\"\" \"About 
You can put this solution on YOUR website!
3x + 4y = 910 ==> eqn.#1
\n" ); document.write( "10x + 5y = 1850 ==> eqn.#2\r
\n" ); document.write( "\n" ); document.write( "Simplify eqn.#2. Divide all terms by 5. This results to\r
\n" ); document.write( "\n" ); document.write( "2x + y = 370 \r
\n" ); document.write( "\n" ); document.write( "Multiply both sides of this equation by -4, thus resulting to -8x - 4y = -1480.\r
\n" ); document.write( "\n" ); document.write( "Add this equation to eqn. #1 to eliminate y and solve for x:.\r
\n" ); document.write( "\n" ); document.write( " 3x + 4y = 910
\n" ); document.write( "-8x - 4y = -1480
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\n" ); document.write( "-5x = -570
\n" ); document.write( "Therefore x = 114. Substitute this value of x in eqn.#1 to find y.
\n" ); document.write( "Then the value of y = 142.\r
\n" ); document.write( "\n" ); document.write( "One brick layer makes $114 a day, while a labour worker receives $142 a day.\r
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