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 doub

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要用方程1thereisadouble-digitnumber.Thefigureonitssingleis1largerthanthatonitstenth-digit,andthedoubledi

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 doub
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?

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 doub
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

其实这个不难
两位数嘛~然后求这个两位数就好
假设个位数是x，十位数是y，这个数就是10y+x
根据第一句话：个位数比十位数大1，也就是x-y=1
根据第二句话：（个位数+十位数)的五倍就是原数，也就是（x+y）*5=10y+x
其实根据这两个式子简化就是：
x-y=1
x-y=1/5 x
也就是1=1/5 x
即x=5，y=...

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其实这个不难
两位数嘛~然后求这个两位数就好
假设个位数是x，十位数是y，这个数就是10y+x
根据第一句话：个位数比十位数大1，也就是x-y=1
根据第二句话：（个位数+十位数)的五倍就是原数，也就是（x+y）*5=10y+x
其实根据这两个式子简化就是：
x-y=1
x-y=1/5 x
也就是1=1/5 x
即x=5，y=4
数目就是45
至于后面的限制条件根本就不用看了
什么十位数比个位数小1
什么十位数个位数互换比原来的数目大9
毕竟就是两个未知数，X,Y
所以只要两个方程就好了~~

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1.两位数嘛~然后求这个两位数就好
假设个位数是x，十位数是y，这个数就是10y+x
根据第一句话：个位数比十位数大1，也就是x-y=1
根据第二句话：（个位数+十位数)的五倍就是原数，也就是（x+y）*5=10y+x
其实根据这两个式子简化就是：
x-y=1
x-y=1/5 x
也就是1=1/5 x
即x=5，y=4
数目就...

全部展开

1.两位数嘛~然后求这个两位数就好
假设个位数是x，十位数是y，这个数就是10y+x
根据第一句话：个位数比十位数大1，也就是x-y=1
根据第二句话：（个位数+十位数)的五倍就是原数，也就是（x+y）*5=10y+x
其实根据这两个式子简化就是：
x-y=1
x-y=1/5 x
也就是1=1/5 x
即x=5，y=4
数目就是45
至于后面的限制条件根本就不用看了
什么十位数比个位数小1
什么十位数个位数互换比原来的数目大9
毕竟就是两个未知数，X,Y 2.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

收起

请教一道英语完型填空----Dou you know if____the latest movie next weekend?---If ___,I will go and see it.A.there wll be;there is B.there wll be; there wll be; C.there is ; there is D.there is ;there wll be对不起，因本人疏忽其中选 文章“Are you a middle student?dou you find that your body is changing?.”翻译 解方程2x-x的平方=2除以x要过程答案dou不对 1.-you had better say sorry to your mother in time.-No way.It is my( )A、mistake B、fault C、wrong D、failture2.（ )he is always placed first in English speech contests.He has a gift for languageand he is hard working as well.A、There is no dou 1.-you had better say sorry to your mother in time.-No way.It is my( )A、mistake B、fault C、wrong D、failture2.（ )he is always placed first in English speech contests.He has a gift for languageand he is hard working as well.A、There is no dou A thief is afraid of the four lettersOICU.Dou you know why?What letter is a question? Is there a supermarket near here?为什么要用near You dou't love a wowan because she is beautiful,But she is buautiful because you love her翻译一下. a few 前面用there is还是there are IS THERE A _______NEARBY 要填( )( )( )E( ) Is there a window? There is a middle there is a cat there is a problem Is there a school Is there a house___? There is a Is there a.