document.write( "Question 271245: How many liters of water containing 5 grams of salt per liter must be combined with x liters of water which contains y grams [y is less than 2] of salt per liter to yield a solution with 2 grams of salt per liter.\r
\n" ); document.write( "\n" ); document.write( "Equation in x and y=? \n" ); document.write( "
Algebra.Com's Answer #198618 by CharlesG2(834)\"\" \"About 
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How many liters of water containing 5 grams of salt per liter must be combined with x liters of water which contains y grams [y is less than 2] of salt per liter to yield a solution with 2 grams of salt per liter.
\n" ); document.write( "Equation in x and y=?\r
\n" ); document.write( "\n" ); document.write( "let L = number of liters of 5 g/L solution\r
\n" ); document.write( "\n" ); document.write( "5L + yx = 2(L+x)
\n" ); document.write( "5L + yx = 2L + 2x
\n" ); document.write( "3L + yx = 2x
\n" ); document.write( "3L = 2x - yx = x(2-y)
\n" ); document.write( "3L / (2-y) = x (this is x)
\n" ); document.write( "L = x(2-y) / 3 (this is L)
\n" ); document.write( "yx = 2x - 3L
\n" ); document.write( "y = (2x - 3L)/x (this is y)\r
\n" ); document.write( "\n" ); document.write( "L max when y=0 --> L = x(2-0) / 3 = 2x / 3
\n" ); document.write( "L min when y=2 --> L = x(2-2) / 3 = 0\r
\n" ); document.write( "\n" ); document.write( "0 < L < (2x)/3\r
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