用一块A型钢板可制成2块C型钢板和1快D型钢板;用一块B型钢板可制成1块C型钢板两块D型钢板.现需15块C型钢板和18块D型钢板,可恰好用A型钢板,B型钢板多少块?
用一块A型钢板可制成2块C型钢板和1快D型钢板;用一块B型钢板可制成1块C型钢板两块D型钢板.现需15块C型钢板和18块D型钢板,可恰好用A型钢板,B型钢板多少块?
数学人气:758 ℃时间:2020-05-19 11:50:53
优质解答
可以设方程嘛.X块A钢板,Y块B,方程为2X+Y=15,X+2Y=18,得X=4,Y=7
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