Question

a recipe uses 7 cups of flour for 4 loaves of bread. How many cups are needed for 25 loaves of bread?

Answer 1

7/4 = B/25 Solve for B

Answer 2

i dont know what B is?

Answer 3

This is solved using proportions.
In Romero's answer B stands for the number of cups needed for 25 loaves.

Do you know how to solve a proportion?

Answer 4

Here is a short video
http://www.khanacademy.org/math/algebra/solving-linear-equations/v/writing-proportions

Answer 5

Nooo i dont /:

Answer 6

And here is how to solve the proportion
http://www.khanacademy.org/math/algebra/ratios-proportions/v/find-an-unknown-in-a-proportion

Answer 7

\[ \frac{7}{4}= \frac{x}{25} \]
\[ x= 25\cdot \frac{7}{4} \]
\[ x= 43 \frac{3}{4} \]