【GRE数学】If x is an odd integer,for which of the following equations must y be an even integer?RT 其他选项都排除了,只剩x+2y=7 & 2x+y=6PS.by the way,integers between 1 and 100,包括1和100这两个数吗?

问题描述:

【GRE数学】If x is an odd integer,for which of the following equations must y be an even integer?
RT 其他选项都排除了,只剩x+2y=7 & 2x+y=6
PS.by the way,integers between 1 and 100,包括1和100这两个数吗?