book Maths Puzzle Numerical Ability

Dividing by n is the smae as multipling by,...

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Please help me solve this problem. I don't know if it's correct.
3(5/14+6+1)
Five is over 14+6 and plus 1 is to the rigt of that fraction. Can you help? 13.7B-6.5=2.36B+8.3 Solve equation with the variable. I do not understand how to work this problem.