exam Maths Puzzle Numerical Ability

2+3(5x+7)=53

3n+2(n-4)= 42

3(x+2)= 15

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exam Other Question

Please if you would
simplify by rationalizing the denominator
(sqrt11-sqrt5)/(sqrt11+sqrt5)

thank you Directions: Add or subtract as indicated. Express your result in simplest form.

Problem# 54

(2)/(5w+10) - (3)/(2w-4)

Problem #58

(3)/(x^2+4x+3)- (1)/(x^2-9)

Problem#62

(4y)/(y^2+6y+5) + (2y)/(y^2-1)