Problema Solution
A chemist needs 900 milliliters of a 40% acid solution for a chemistry experiment. The chemist combines x milliliters of a 20% acid solution and y milliliters of a 70% acid soulution to make the 40% acid solution. Find x and y
Answer provided by our tutors
20% acid solution of x ml + 70% acid solution of y ml = 40% acid solution of 900 ml
0.20*x + 0.70*y = 0.40*900
also
x + y = 900
by solving the system of equations
x + y = 900
0.20*x + 0.70*y = 0.40*900
we find
x = 540 ml
y = 360 ml
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