Question

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

Answer 1

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:

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

Therefore, solving for x:

$\begin{gathered} x+5.46=9.1 \\ x=9.1-5.46 \\ x=\frac{91}{25}=3.64 \end{gathered}$