Question

Riley wants to make 100ml of 25% saline but only has access to 12% and 38% saline mixtures. x= 12% y=38%

Answer 1

x = 50

y = 50

Explanation:

`\begin{bmatrix}x+y=100\\ 0.12x+0.38y=25\end{bmatrix}`

.12(100-y) + .38y = 25

x = 50

y = 50