document.write( "Question 275440: The sum of two integers are 10. Three times one integer is 3 less than 8 times the other integer. Find the numbers.\r
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document.write( "I have tried 3x + 8(10 - x) - 3=10, also 3(10 - x)+ 8x - 3, I've started out on x+y=10, so if one integer is x, the other has to be (10 - x), like x + (10 - x)=10, but no answer. It seems like an easy one, can you help?\r
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document.write( "Thank you,\r
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document.write( "Alex Vargas
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document.write( "avargas91702@hotmail.com \n" );
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Algebra.Com's Answer #854110 by greenestamps(13327) You can put this solution on YOUR website! \n" ); document.write( "You have a problem common among students first learning to solve problems using algebra: turning the given information into a correct algebraic equation. \n" ); document.write( "You do, however, have a good start on another part of setting the problem up -- using the information that the sum of the two number is 10 to call the two numbers \"x\" and \"10-x\". \n" ); document.write( "Now for converting \"Three times one integer is 3 less than 8 times the other integer\" into a correct equation.... \n" ); document.write( "\"Three times one integer...\" \n" ); document.write( "you have that part okay: \n" ); document.write( "Your equation to here is \"3x...\" \n" ); document.write( "\"... is\" \n" ); document.write( "That is your equals sign; think of it as saying \"is equal to\" instead of just \"is\" \n" ); document.write( "Now your equation is \"3x =...\" \n" ); document.write( "\"...3 less than 8 times the other integer\" \n" ); document.write( "Here is where beginning algebra students make a very common error. They see the \"3 less...\" and they write \"3-...\". But \"3 less than A\" is \"A - 3\", not \"3 - A\". So \n" ); document.write( "\"x\" is your \"one number\", so the other number is \"10-x\". Then \"8 times the other number\" is \"8(10-x)\", and finally \"3 less than 8 times the other number\" is \"8(10-x)-3\". \n" ); document.write( "And now you have the complete equation: \n" ); document.write( "\"3x = 8(10-x)-3\" \n" ); document.write( "Now you can solve using basic algebraic operations. \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "And the numbers are x=7 and (10-x)=3 \n" ); document.write( "ANSWERS: 7 and 3 \n" ); document.write( " \n" ); document.write( " |