book Maths Puzzle Numerical Ability

okay i dont know how to do the whole typy in htingy but it says
"the square root of x+2 = the square root of 3x-6 so is it 4?

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book Other Question

simplify the complex fraction : Rt=1/((1/R1)+(1/R2)+(1/R3))

in R1, R2, and R3 1,2, and 3 are subscripts
a football player runs directly down the field for 35 m before turning to the right at an angle of 25 degree from his original direction and running an additional 15 m before getti