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Antoine works in the paint department at his local hardware store. He is trying to create a new color of paint using two different colors in stock: powder blue, which is made with blue (the rest is white), and spring blue, which is 10% blue (the rest is white). He wants to end up with one gallon of paint made with blue. How much of each color should he use?

Let the amount of powder blue paint and y = the amount of spring blue paint. Write and solve a system of equations.

One equation says that the total amount of paint used equals one gallon.
The other equation represents the percents of the mixture: