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How do newtons third law of motion demonstrates on a rollar coster

Mahnoor randomly selects times to walk into a local restaurant and observe the type of music being played she found that the restaurant was playing country 11 times rock & roll 17 times and blues 8 times use the observed frequencies to create a probability model for the type of music the restaurant is playing the next time mahnoor walks in.

What number can each term of the equation be multiplied by to eliminate fractions before solving ? 6-3/4x+1/3=1/2x+5