Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 在水果沙拉中，有覆盆子、绿葡萄和红葡萄。红葡萄的数量是绿葡萄数量的3倍加7个。覆盆子的数量比绿葡萄少5个。如果沙拉中有102个水果，那么有多少个红葡萄？


### Response:
 绿葡萄 = G
红葡萄 = 3G + 7
覆盆子 = G - 5
G + 3G + 7 + G - 5 = 102
5G + 2 = 102
5G = 100
G = <<20=20>>20
3 * 20 + 7 = <<3*20+7=67>>67
沙拉中有67个红葡萄。