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ZX-91621E35F52026年3月国际B卷 · 第 11 题
2026年3月国际B卷 · 原库模块 2 · Q11 原库参考解析
\( 0.10x+0.20y=0.19(x+y) \)
The equation gives a volume x, in gallons, of a 10% saltwater solution that could be mixed with a volume y, in gallons, of a 20% saltwater solution to produce a 19% saltwater solution. According to this equation, what volume, in gallons, of the 20% saltwater solution could be mixed with 80.0 gallons of the 10% saltwater solution to produce a 19% 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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