要用方程1 there is a double-digit number.The figure on its singl

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/25 00:51:02

要用方程
1 there is a double-digit number.The figure on its single is 1 larger than that on its tenth-digit ,and the double digit numbei is 5 times as large as the sum of figures on its tenth-digit and on its single-digit.Question:what is the double-digit number?2 there is a double-digit number.The figure on its tenth-digit is 1 smaller than that on its single digit.If the figures on its tenth-digit and on its single-digit are exchand,the newly-got number will be 9 larger than the original one.Question::what is the original double-digit?

用一元.
两个数你设为x和x+1
（x+x+1）*5=10x+x+1
10x+5=11x+1
x=4
x+1=5
最后就是45了

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