quaintance2020
contestada

Andrea has 800L of acid solution. She obtained it by mixing some 7​% acid with some 10​% acid. Her final mixture of 800L is 9.25​% acid. How much of the 7​% and 10​% solutions did she use to make her final​mixture?

Respuesta :

hello9532

Answer:

600,200

Step-by-step explanation:

so we need 74L of acid and there is 800L of solution and we get the equation 0.1x+0.07y=74 and x+y=800 so we get x=600 and y=200