book Maths Puzzle Numerical Ability

If I know that E = A - (B/C) + D and E is known, how do you solve for B?

Thanks,

RH

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book Other Question

Dick can run the 440 yard dash in 55 seconds. Jack can run the 440 yard dash in 88 seconds. How great a handicap must Dick give Jack in order for the two boys to finish the race at 7+3c=-11