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We started with some glue that is $80 %$ solid and $20 %$ water. We added some thin glue that was $40 \%$ solid and $60 \%$ water and ended up with 50 pounds of glue that was $70 %$ solid and $30 V$ water. Determine which one of the following equations would correctly use $X$ to solve for the amount of $80 / 20$ glue that we started with. a) $x * 0.80+X * 0.40=50 * 0.70$ b) $x * 0.80+50 * 0.60=( 50+x) * 0.70$ c) $X * 0.80+50 * 0.40=(50+x) * 0.70$ d) $x * 0.80+(50-x) * 0.60=50 * 0.70$ e) $X * 0.80+(50-x) * 0.40=50 * 0.70$CS.SD.182 |