Q: when a group of girls are put into teams of x, there are two girls left without a team. The same happens with teams of 7 or 8. How many girls are there in the group?
I thought the equation would be:
6x + 2 = 7y + 2 = 8z + 2
Not sure if I'm on the right track. I can't solve it cause there are multiple letters.
Even if i reduce the equation to 6x+2 = 7y+2, I still don't know how to go on solving it.
The answer at the back said 170. But how can you prove this mathematically>?
I thought the equation would be:
6x + 2 = 7y + 2 = 8z + 2
Not sure if I'm on the right track. I can't solve it cause there are multiple letters.
Even if i reduce the equation to 6x+2 = 7y+2, I still don't know how to go on solving it.
The answer at the back said 170. But how can you prove this mathematically>?