find four consecutive integers that twice the fourth is 4 le

问题描述:

find four consecutive integers that twice the fourth is 4 less than the firs
how
1个回答 分类:数学 2014-09-24

问题解答:

我来补答
# 4 个连续的整数,其中第四个数目的两倍比第一个数目小4.
4个整数分别是:X ,X+1 ,X+2 ,X+3
# twice the forth is 4 less than the first
# 第4个数目的两倍比第一个数目小4,可以写成:
2 *(X+3)+ 4 = X
==》 2X + 6 + 4 = X
==》 2X - X = -10
==》 X = -10
所以,4个连续的整数为:-10,-9,-8,-7
# 验算:2 * (-7) + 4 = -10
OK!
 
 
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