A scientist removed a sample of 39.1 grams of a chemical from a container. The sample was 5 3/4 grams less than 3/10 of the total mass of the chemical in the container. What was the total mass, in grams, of the chemical in the container before the scientist removed the sample of 39.1 grams? Show your work or explain how you know.
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let the total mass in container initially be x
the mass remaining after scientist removed 39.1
=x-39.1
According to given condition
3x/10-23/4=39.1
3x/10-23/4=391/10
(3x-391)/10=23/4
3x-391=230/4
3x=230/4+391
3x=(230+1564)/4
3x=1794/4
x=149.5grams
please check the calculation
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