A+A+A+B+B=6.5，A+B+B=5

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3A+2B=6
A+2B=5
解二元一次方程

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A+A+5=6.5 2A=1.5 A=0.75 0.75+2B=5 B=2.125

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 岩信悉粗乎坦颤

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