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ZX-22EDDBA2A62025年12月国际B卷 · 第 19 题
2025年12月国际B卷 · 原库模块 1 · Q19 原库参考解析
\( 0.10x+0.20y=0.18(x+y) \)
This equation represents mixing a volume x, in gallons of a 10% saltwater solution with a volume y , in gallons of a 20% saltwater solution to produce an 18% saltwater solution. According to this equation, what volume, in gallons, of the 20% saltwater solution could be mixed with 45.0 gallons of the 10% saltwater solution to produce an 18% saltwater solution? (Assume that the volume of the mixture is the sum of the volumes of the two solutions before they were mixed.)
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