book Maths Puzzle Numerical Ability

SOlve for x

2 / x+1 plus 1 = 9 / x+1

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book Other Question

Find the value of x.

(5/(x+4))-((3x-5)/(x^2+x-12))=(4/(x-3))

Possible answers

a. -13
b. -13/2
c. 13/2
d. 13 William is 1/6 as old as his father but 5 years older than his sister, Mary. If the sum of all their ages is 51, how old is William?

(not from a text) Thank You for your help.