What are the coefficients in the algebraic expression

Agrocery store has 12 lb of trail mix that is 10% banana chips. the store's manager would like to add banana chips to bring the new mix up to 25% banana chips. write and solve a system of equations to find out how many pounds of banana chips manager needs to add.

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

Find the equation using the point (4,8)