Three of the most classic word problems in algebra are mixture, percent mixture, and rate word problems. For the mixture and percent mixture, try writing one equation that represents amount only, and a second equation that represents amount times percent (or cost.) If the decimals are overwhelming, you can multiply an entire equation by, say 100 to make the decimals turn in to integers. For the rate problem, consider whether the rate is speeding up or slowing down the speed of the object. You will need to use the relationship "distance = rate times time" and see which of those three stays the same in your problem context.
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