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Natalie uses 9.1 pints of white paint and blue paint to paint her bedroom walls.3/5 of this amount is white paint,the rest is blue paint .how many pints of blue paint did she use to paint her bedroom walls

User Mcruz
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1 Answer

5 votes

Let:

T = Total amount of paint

x = Amount of blue paint

y = Amount of white paint

So:


x+y=T

3/5 of this amount is white paint, so:


\begin{gathered} y=(3)/(5)\cdot T \\ y=(3)/(5)(9.1) \\ y=5.46 \\ \end{gathered}

Therefore, solving for x:


\begin{gathered} x+5.46=9.1 \\ x=9.1-5.46 \\ x=(91)/(25)=3.64 \end{gathered}

User Liu Zhang
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