Algebra in Words presents WORD PROBLEMS DECODED by Gregory P. Bullock

Author:Gregory P. Bullock [Bullock, Gregory P.]
Language: eng
Format: azw3
Published: 2015-11-16T00:00:00+00:00

0.##x + 0.##(# – x) = #.##

Note: Usually, the units for the values in the equation are clear. For this type, you could say they are “Liters of the active ingredient,” however, they are not so obvious in this particular type of problem. In short, this is because chemical concentration can be expressed in many different units, including percentage. Even concentration by percentage can be expressed with respect to different units such as weight, volume, and moles (atoms or particles). For simplicity, it’s best to just use the template equation, plug in the given values, and multiply the percents in decimal form times each respective volume (which will initially be the unknowns); just make sure each volume is in the same unit as each other (likely liters or milliliters). Back to WP9. To see a two-chemical mix problem solved with two variables and two equations, see WP48.

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