document.write( "Question 417730: Will solve the equation. Just need help utilizing proper formula. Thank you. How many gallons of a 3% salt solution must be mixed with 50 gallons of a 7% solution to obtain a 5% solution? \n" ); document.write( "
Algebra.Com's Answer #292418 by mananth(16946)\"\" \"About 
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percent ----------------quantity
\n" ); document.write( "7 ----------------50
\n" ); document.write( "3 ----------------x
\n" ); document.write( "5 ----------------50+x\r
\n" ); document.write( "\n" ); document.write( "..
\n" ); document.write( "7*50+3*x=5(50+x)
\n" ); document.write( "350+3x=250+5x
\n" ); document.write( "3x-5x=250-350
\n" ); document.write( "-2x=-100
\n" ); document.write( "/-2
\n" ); document.write( "x=50 gallons
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