document.write( "Question 144110: If 3x+y=90 and 10<=x<=25 what is the least possible value of y?\r
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Algebra.Com's Answer #105086 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!
If \"3x%2By=90\" and \"10%3C=x%3C=25\" what is the least possible value of y?
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document.write( "Since the equation is that of a line, its least and highest possible \r\n" );
document.write( "y-values are at the endpoints of the interval.\r\n" );
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document.write( "We substitute the left endpoint of the interval,\r\n" );
document.write( "\"10\" for \"x\" in\r\n" );
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document.write( "\"3x%2By=90\"\r\n" );
document.write( "\"3%2810%29%2By=90\"\r\n" );
document.write( "\"30%2By=90\"\r\n" );
document.write( "\"y=60\"\r\n" );
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document.write( "Then we substitute the right endpoint of the interval,\r\n" );
document.write( "\"25\" for \"x\" in\r\n" );
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document.write( "\"3x%2By=90\"\r\n" );
document.write( "\"3%2825%29%2By=90\"\r\n" );
document.write( "\"75%2By=90\"\r\n" );
document.write( "\"y=15\"\r\n" );
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document.write( "And the largest value of y is 60 and the least value of y is 15.\r\n" );
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document.write( "And also solve for d\r\n" );
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document.write( "\"d+=+%283x%29%2Fy\"\"%28y%2B1%2Fx%29\"\r\n" );
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document.write( "Use the distributive principle:\r\n" );
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document.write( "\"d+=+%283x%29%2Fy\"\"%28y%2B1%2Fx%29\"\r\n" );
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document.write( "\"d+=+%28%283x%29%2Fy%29\"\"%28%28y%29%2B%281%2Fx%29%29\"\r\n" );
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document.write( "\"d+=+%28%283x%29%2Fy%29%28y%29%2B+%28%283x%29%2Fy%29%281%2Fx%29%29\"\r\n" );
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document.write( "Then cancel:\r\n" );
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document.write( "and all that's left is:\r\n" );
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document.write( "\"d+=+3x%2B+3%2Fy\"\r\n" );
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document.write( "Edwin
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