My sister is 13 years old. My brother says that his age minus sixteen is equal to my sisters age. How old is my brother?

29 years old.

Step-by-step explanation:

If the sister is 13 and the brother minus 16 years of her age is his age then you can set this up as the problem: a - 16 = 13, where a=the brother's age.

How to set up the problem: Read the question and underline.

My sister is 13 years old. My brother says that his age minus sixteen is equal to my sisters age.

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)  

- Cutiepatutie ☺❀❤

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15