The sum of the ages of two sisters is 35. the younger sister is 3 more than 1/3 of the older sister's age. how old is the younger sister?

Set the sisters' ages to x and y 
x + y = 35

let's say x = younger sister's age
and y = older sister's age

so
x = [(1/3)*y] + 3

plug in the value above for x in the equation x + y = 35

solve for y, then for x

remember which variable you set for the younger sister, and make sure that you use that variable as your answer

Hope this helped!

Alana needs to carve out a specific monthly budget for herself and keep to it. She could make use of the envelope method to do so. She has to work enough to earn at least $600 in one month, that would take care of her expenses (rent, food, transport etc) that come out to be $524.

Step-by-step explanation:

Alana needs to be more aware of her spending pattern, only then will she be able to save a certain amount of money on a monthly basis. Creating a cash flow statement will help her in this regard.