document.write( "Question 485278: A landscaper needs to mix 75% pesticide solution with 30 gals. Of 25% pesticide solution to obtain a 60% pesticide solution. How many gallons of the 75% solution must be used ? \n" ); document.write( "
Algebra.Com's Answer #331915 by lwsshak3(11628)\"\" \"About 
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A landscaper needs to mix 75% pesticide solution with 30 gals. Of 25% pesticide solution to obtain a 60% pesticide solution. How many gallons of the 75% solution must be used
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\n" ); document.write( "let x=gal of 75% solution must be used
\n" ); document.write( "x+30=gal of 65% solution
\n" ); document.write( "..
\n" ); document.write( "75%*x+25%*30=60%*(x+30)
\n" ); document.write( ".75x+.25*30=.6x+.6*30
\n" ); document.write( ".75x+7.5=.6x+18
\n" ); document.write( ".15x=10.5
\n" ); document.write( "x=10.5/.15=70
\n" ); document.write( "ans:
\n" ); document.write( "70 gal of 75% solution must be used
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