Derek,Erica and Fred share $108 in the ratio 3:4:2
Calculate the amount of money Erica gets.
The hypotenuse of a right-angled triangle is 2x+3 cm long,and the two other sides have lengths xcm and x+7cm.
Make an equation,solve it and find the lengths of the three sides.
有空的话就请帮我做一下这个题目,如果没时间就只要翻译就好。因为时间紧急,所以请速度要快喔..^_^