if somebody say"你好"to you,you can answer"你好"or"谢谢"to him.we don't respond"你好"by"我也好"; "我很好，你呢？"; "我也很好".

你好 is hello, it's different from "How are you?". So if somebody say hello (你好)，you will reply by hello (你好). When somebody says "how are you", which should be "你好吗" in Chinese, then you can say "我很好（I am fine）", "谢谢( Thank you)", "你呢？(and you?)" and then followed by "我也很好(I'm fine too)". And usually we say "我很好" “我也很好”, instead of "我好"，“我也好”, since the last two really sounds weird to me.

when somebody say 你好 to me... can i answer 我也好 .... ? if i want to say " i'm fine, and you? " what should i say? and if i want to say " i'm fine too " what should i say? thx in advance :) I am fine 我很好 I am fine too 我也很好 希望对你有用

如果随意一点的话，可以说：最近不错，你呢？

Ａ)　你好 Ｂ)　你好吗？ Ａ)　我很好，　你呢？ Ｂ)　我也很好