Sea water

Mixing 62 kg of seawater with 84 kg rainwater is created water containing 3.1% salt. How much percent of seawater contains salt?

Correct answer:

x =  7.3 %

Step-by-step explanation:

m1=62 kg m2=84 kg  p=3.1 %   p = 100    m1+m2 100x   m1   p    100m1+m2 = 100x   m1   p   (m1+m2) = x   m1  x=p m1m1+m2=3.1 6262+84=1073%=7.3%

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